DOCSLIB.ORG

NABC Working at Nest-Boxes Manual

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
NABC Working at Nest-Boxes Manual THE NORTH AMERICAN BANDERS’ MANUAL FOR BANDING AT NEST BOXES By Lesley-Anne Howes Canadian Wildlife Service Environment Canada 1125 Colonel By Drive Ottawa, Ontario K1A 0H3 And Barbara Frei Dept. of Natural Resource Sciences Macdonald Campus McGill University 21,111 Lakeshore Road Ste.-Anne-de-Bellevue, QC H9X 3V9 Version 1 August 2014 This manual is intended as a supplement to The North American Banders’ Study Guide 2001. 1 THE NORTH AMERICAN BANDERS’ MANUAL FOR BANDING AT NEST BOXES was supported by funding from Environment Canada. Copyright© 2014 by Lesley-Anne Howes and Barbara Frei The North American Banding Council P.O. Box 1346 Point Reyes Station, California 94956-1346 U.S.A. http://www.nabanding.net/ All rights reserved. Reproduction for educational purposes permitted. 2 TABLE OF CONTENTS PREFACE ....................................................................................................................................................... 2 ACKNOWLEDGMENTS ................................................................................................................................... 2 INTRODUCTION ............................................................................................................................................. 2 THE BANDER'S CODE OF ETHICS ..................................................................................................................... 2 THE BANDER'S CODE OF ETHICS ..................................................................................................................... 3 SECTION ONE ................................................................................................................................................ 4 TRAINING ........................................................................................................................................................ 4 PLANNING YOUR STUDY ..................................................................................................................................... 4 PERMITS ....................................................................................................................................................................... 5 WHAT TO CARRY WITH YOU ............................................................................................................................................. 5 COLLECTING BIOLOGICAL SAMPLES ................................................................................................................................... 6 AUXILIARY MARKERS ...................................................................................................................................................... 6 COLOUR BANDS ............................................................................................................................................................. 7 NEST BOX SPECIFICS ........................................................................................................................................... 8 NEXT BOX DESIGN .......................................................................................................................................................... 8 NEST BOX PLACEMENT .................................................................................................................................................... 8 PREDATOR PROOF YOUR BOXES ....................................................................................................................................... 9 BANDING ADULT BIRDS ...................................................................................................................................... 9 (A) TIMING ................................................................................................................................................................... 9 (B) CAPTURE ............................................................................................................................................................... 10 (C) HANDLING AND PROCESSING..................................................................................................................................... 12 BANDING NESTLING BIRDS ................................................................................................................................ 12 (A) TIMING ................................................................................................................................................................. 12 (B) CAPTURE OF NESTLINGS ........................................................................................................................................... 13 (C) HANDLING AND PROCESSING..................................................................................................................................... 13 (D) AGEING AND SEXING NESTLINGS ............................................................................................................................... 14 DATA MANAGEMENT ....................................................................................................................................... 14 BANDER SAFETY .............................................................................................................................................. 15 AVIAN DISEASES .............................................................................................................................................. 15 SECTION TWO: ............................................................................................................................................ 16 TAXA SPECIFIC RECOMMENDATIONS .................................................................................................................... 16 AMERICAN KESTREL (AMKE) .............................................................................................................................. 16 CHICKADEES ................................................................................................................................................... 17 BLACK-CAPPED CHICKADEE (BCCH) ...................................................................................................................... 17 BOREAL OWL (BOOW) ...................................................................................................................................... 18 EASTERN BLUEBIRD (EABL) ................................................................................................................................. 18 MOUNTAIN AND WESTERN BLUEBIRD (MOBL AND WEBL) ......................................................................................... 19 GREAT-CRESTED FLYCATCHER (GCFL) .................................................................................................................... 19 HOODED MERGANSER (HOME) ........................................................................................................................... 20 HOUSE WREN (HOWR) ...................................................................................................................................... 20 NORTHERN SAW-WHET OWL (NSWO) .................................................................................................................. 21 PROTHONOTARY WARBLER (PROW) .................................................................................................................... 22 3 PURPLE MARTIN (PUMA) .................................................................................................................................. 22 TREE SWALLOW (TRES) ..................................................................................................................................... 23 OTHER SPECIES ............................................................................................................................................... 24 LITERATURE CITED ...................................................................................................................................... 26 APPENDIX A: COLLABORATIVE NEST MONITORING PROJECTS ...................................................................... 32 APPENDIX B: ADDITIONAL RESOURCES ........................................................................................................ 33 APPENDIX C: THE NORTH AMERICAN BANDING COUNCIL ............................................................................. 34 APPENDIX D: BANDING OFFICES INFORMATION ........................................................................................... 34 4 PREFACE of opinions that are encapsulated in this publication. The purpose of the publications of the North American Banding Council (NABC) is to This North American Manual for Banding at provide bird banders in North America with Nest Boxes has been approved by the North basic best practices for safe and ethical capture, American Banding Council's Publications handling and banding of birds. This guide Committee for use throughout North America. contains specific information on how to safely This guide is the product of many years of and productively conduct bird banding at nest collective experience on the part of many boxes. banders. Much of the information in this guide is a compendium of material taken from other The information in this guide complements the sources including the North American Bird North American Banders’ Study Guide (North Banding: Volume I (Canadian Wildlife Service American
Load more

Recommended publications
  • Aves: Hirundinidae)
    1 2 Received Date : 19-Jun-2016 3 Revised Date : 14-Oct-2016 4 Accepted Date : 19-Oct-2016 5 Article type : Original Research 6 7 8 Convergent evolution in social swallows (Aves: Hirundinidae) 9 Running Title: Social swallows are morphologically convergent 10 Authors: Allison E. Johnson1*, Jonathan S. Mitchell2, Mary Bomberger Brown3 11 Affiliations: 12 1Department of Ecology and Evolution, University of Chicago 13 2Department of Ecology and Evolutionary Biology, University of Michigan 14 3 School of Natural Resources, University of Nebraska 15 Contact: 16 Allison E. Johnson*, Department of Ecology and Evolution, University of Chicago, 1101 E 57th Street, 17 Chicago, IL 60637, phone: 773-702-3070, email: [email protected] 18 Jonathan S. Mitchell, Department of Ecology and Evolutionary Biology, University of Michigan, 19 Ruthven Museums Building, Ann Arbor, MI 48109, email: [email protected] 20 Mary Bomberger Brown, School of Natural Resources, University of Nebraska, Hardin Hall, 3310 21 Holdrege Street, Lincoln, NE 68583, phone: 402-472-8878, email: [email protected] 22 23 *Corresponding author. 24 Data archiving: Social and morphological data and R code utilized for data analysis have been 25 submitted as supplementary material associated with this manuscript. 26 27 Abstract: BehavioralAuthor Manuscript shifts can initiate morphological evolution by pushing lineages into new adaptive 28 zones. This has primarily been examined in ecological behaviors, such as foraging, but social behaviors 29 may also alter morphology. Swallows and martins (Hirundinidae) are aerial insectivores that exhibit a This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.
    [Show full text]
  • The Evolution of Nest Construction in Swallows (Hirundinidae) Is Associated with the Decrease of Clutch Size
    © Biologiezentrum Linz/Austria; download unter www.biologiezentrum.at Linzer biol. Beitr. 38/1 711-716 21.7.2006 The evolution of nest construction in swallows (Hirundinidae) is associated with the decrease of clutch size P. HENEBERG A b s t r a c t : Variability of the nest construction in swallows (Hirundinidae) is more diverse than in other families of oscine birds. I compared the nest-building behaviour with pooled data of clutch size and overall hatching success for 20 species of swallows. The clutch size was significantly higher in temperate cavity-adopting swallow species than in species using other nesting modes including species breeding in evolutionarily advanced mud nests (P<0.05) except of the burrow-excavating Bank Swallow. Decrease of the clutch size during the evolution of nest construction is not compensated by the increase of the overall hatching success. K e y w o r d s : Hirundinidae, nest construction, clutch size, evolution Birds use distinct methods to avoid nest-predation: active nest defence, nest camouflage and concealment or sheltered nesting. While large and powerful species prefer active nest-defence, swallows and martins usually prefer construction of sheltered nests (LLOYD 2004). The nests of swallows vary from natural cavities in trees and rocks, to self-exca- vated burrows to mud retorts and cups attached to vertical faces. Much attention has been devoted to the importance of controlling for phylogeny in com- parative tests (HARVEY & PAGEL 1991), including molecular phylogenetic studies of swallows (WINKLER & SHELDON 1993). Interactions between the nest-construction va- riability and the clutch size, however, had been ignored.
    [Show full text]
  • NFBB Vol. 21 1946
    Issued Quarterly by the Western Bird-Banding Association The Editors Resign New Members: A Bigger and Better W.B.B.A. Banded Gulls Pioneer OI~ithologist - Joseph Mailliard Results from Wildlife Service Files of Banded Robins Band-tailed Pigeons Nest in Colorudo Bandlng Activities with Birds of Prey in 1944 and 1945 Dea.d Owls and Mou.rning Doves Not How Many but How Rare California Blue Grosbeaks at Pomona Annual Report - 1945 Banders Who Reported for the Year 1945 Notes on Colorado Birds Banders at the Mission Nest Parasites Band Records Lost Traps Made Available Co-editors of the ~ President of W.E.B.A --- F. G. Crawford Mary M. Erickson, Santa Barbare'J Calif. 2782 Glen Avenue, Altadena, California Frank M. Erickson, Santa Barbara, Calif. Address all contributions to the ~ to Mrs. M. C. Sargent, P. O. Box 109, La Jolla, California At the request of P~esident F. G. Crawfo~d and with due modesty, the Editors give place to the following statement: "At its January meeting, the councillo!'s of W.E.B.A. extended to me the privilege of voicing their gratitude for the faithful and excellent editorial work that Dr. Mary M. Erickson and Dean Frank M. Erickson have devoted to the ~ for the past five years. It is certain that the entire membership of the Association joins the Council in this appreciution. We deeply regret that the co-editors find it necessary to conclude their editorial duties with this issue. "That the News hus continued to grow in quality is solely due to the efforts of our co-editors.
    [Show full text]
  • Head-Scratching Method in Swallows Depends on Behavioral Context
    SHORT COMMUNICATIONS 679 shoulder-spot display during their observations of behavior in partridges. In all cases that I observed, the shoulder spot appeared to be a fear or flight intention display as described by Lumsden (1970). However, the display seemed secondary in importance compared to vocalizations and “tail flicking” during periods of extreme alarm. Examination of the shoul- der spot of a partridge confirmed the realignment of white underwing coverts to the top of the wing in the patagial region. The manipulation by the bird of underwing feathers appeared to be identical to that of Ruffed Grouse (Bonusa umbellus)(Garbutt 198 1). Since “display” implies actual communication between individuals further investigation is needed to de- termine if, in fact, the shoulder spot actually is serving a communication function in Gray Partridge. The shoulder spot in Gray Partridges and the display seen in grouse are morphologically similar. Lumsden (1970) concluded that the widespread occurrence of this display among grouse indicated it appeared relatively early in evolution. The morphological and behavioral similarities between the display in grouse and partridges suggest that the shoulder spot may have evolved even earlier. Since this is an escape behavior, and since many species of partridges and pheasants are difficult to observe in the wild, it may have been overlooked. Acknowledgments.-Theseobservations were made while the author was supported by funds from the North Dakota Game and Fish Department through Pittman-Robertson Project W-67-R. Additional support was provided by the Biology Department and Institute for Ecological Studies at the University of North Dakota. Helpful editorial comments were provided by R.
    [Show full text]
  • Purple Martin Project Our Vision
    New York PurPle Martin Purple Martin P r o j e c t Project New York PHOTO JIM WILLIAMS Female and male parents share in building the nest to raise their young Adult female on the left shown with two of its young IN NEW YORK STATE, PURPLE MARTINS Check out these websites HAVE DECLINED BY 39% since 1985. for more information on purple martins: Help Reverse the Trend! www.friendsofiroquoisnwr.org/ The National Audubon Society suggests the purplemartins/media.html following ways that you can help to conserve newyorkwild.org/martin/martin_video.htm Purple Martins: purplemartin.org ■ Purchase or construct and install appropriate birds.audubon.org/species/purmar martin housing, including predator proofing. Project Partners Housing standards can be found at New York State Ornithological Association www.purplemartin.org Buffalo Audubon Society ■ Protect martin colonies from European Buffalo Ornithological Society Starlings and House Sparrows by trapping or Purple Martin Conservation Association otherwise removing these non-native nest Friends of Iroquois NWR site competitors. New York State Bluebird Society ■ Plant native trees, shrubs, flowers and Orleans Bluebird Society grasses which attract more insects than non- If you have questions about caring for a natives. In fact, they support almost 30 times Purple Martin colony, please contact: more insect diversity than introduced plants. FINWR c/o Carl Zenger ■ Avoid applying pesticides that kill or poison 1101 Casey Road flying insects that martins eat. Basom, NY 14013 Carl Zenger: [email protected] 716-434-7568 ■ Create a dragonfly pond to attract and breed these and other insects preferred by martins. Celeste Morien : [email protected] 585-721-8202 ■ Maintain a pile of small gravel or sand in an Pat Lynch: [email protected] open area for grit.
    [Show full text]
  • Colorado Field Ornithologists the Colorado Field Ornithologists' Quarterly
    Journal of the Colorado Field Ornithologists The Colorado Field Ornithologists' Quarterly VOL. 36, NO. 1 Journal of the Colorado Field Ornithologists January 2002 Vol. 36, No. 1 Journal of the Colorado Field Ornithologists January 2002 TABLE OF C ONTENTS A LETTER FROM THE E DITOR..............................................................................................2 2002 CONVENTION IN DURANGO WITH KENN KAUFMANN...................................................3 CFO BOARD MEETING MINUTES: 1 DECEMBER 2001........................................................4 TREE-NESTING HABITAT OF PURPLE MARTINS IN COLORADO.................................................6 Richard T. Reynolds, David P. Kane, and Deborah M. Finch OLIN SEWALL PETTINGILL, JR.: AN APPRECIATION...........................................................14 Paul Baicich MAMMALS IN GREAT HORNED OWL PELLETS FROM BOULDER COUNTY, COLORADO............16 Rebecca E. Marvil and Alexander Cruz UPCOMING CFO FIELD TRIPS.........................................................................................23 THE SHRIKES OF DEARING ROAD, EL PASO COUNTY, COLORADO 1993-2001....................24 Susan H. Craig RING-BILLED GULLS FEEDING ON RUSSIAN-OLIVE FRUIT...................................................32 Nicholas Komar NEWS FROM THE C OLORADO BIRD R ECORDS COMMITTEE (JANUARY 2002).........................35 Tony Leukering NEWS FROM THE FIELD: THE SUMMER 2001 REPORT (JUNE - JULY)...................................36 Christopher L. Wood and Lawrence S. Semo COLORADO F IELD O
    [Show full text]
  • Dear Parents/Carers, F2 Lilac Pink Red Year 1 Yellow Blue Green
    Dear Parents/Carers, Over the next few weeks, we will be making changes to the system we use to grade the reading books that the children bring home. All books Lilac will be placed in a colour band and will no longer be given a number or F2 Pink stage. The same system will be used throughout the school, making it Red easier to track the children's progress. Yellow Blue Over the next week or two, we will be assessing each child’s reading level. Year 1 Green In the past, the emphasis has been on decoding skills. However, we will Orange now also be looking at their comprehension, because reading success Turquoise depends not only on being able to read the words but also on their Purple understanding. This also means that children need to use the punctuation Gold to make sense of the text. When we assess the children, we will be Year 2 White analysing their errors to understand what their next steps are. Obviously, this will take some time for us to get to grips with, so we hope that you Year 3 will be understanding while we get round every child. You might feel that Lime your child has ‘gone down a level’. Please be assured that this is not the Year 4 case, because we are also looking at comprehension. Brown Year 5 The colour band system begins with lilac books. These books have no Grey words and will be given to those children who are getting ready to read. Dark Blue Lilac books can be used to teach a child how books work and to encourage Year 6 Burgundy them to tell a story using the pictures.
    [Show full text]
  • T/Iieuicanauseum
    >t/iieuicanAuseum PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK 24, N.Y. NUMBER 1723 APRIL 29, 1955 Studies of Peruvian Birds. No. 66 The Swallows (Hirundinidae) BY JOHN T. ZIMMER I am again indebted to Dr. William H. Phelps of Caracas, Mr. James Bond and Mr. Rodolphe de Schauensee of the Academy of Natural Sciences of Philadelphia, Mr. James Greenway of the Museum of Comparative Zoology, Cambridge, and to Dr. Allan R. Phillips of Tucson, Arizona, for the loan of critical material used in the following studies. Names of colors are capitalized when direct comparison has been made with Ridgway's "Color standards and color nomenclature." Progne chalybea chalybea (Gmelin) [Hirundo] chalybea GMELIN, 1789, Systema naturae, vol. 1, pt. 2, p. 1026- based on Hirundo cayanensis Brisson, Ornithologie, vol. 2, p. 495, pl. 46, fig. 1, and Daubenton, Planches enlumin6es, pl. 545, fig. 2; Cayenne. Progne leucogaster BAIRD, 1865 (May), Smithsonian Misc. Coll., no. 181, p. 280-various localities in Mexico, Guatemala, [El] Salvador, Costa Rica, Pa- namA, and Colombia; type in U. S. Natl. Mus. from Cajab6n, Guatemala. Puerto Indiana, 3 c, 2 9 ; Morropon, 4 c, 2 9. Compared with 118 additional skins from central Brazil north to the three Guianas and Trinidad, to the eastward, and Mexico and Texas, to the westward, with all intermediate countries except British Hon- duras represented in the series. A random sample of 15 males and 11 females from throughout the range shows the males to have the wing 124-138 mm. (average, 131.7); tail, 58-66 (62.5); females, wing, 121- 132 (130); tail, 54-65 (61).
    [Show full text]
  • Breeding Biology of Asian House Martin Delichon Dasypus in a High-Elevation Area
    FORKTAIL 28 (2012): 62–66 Breeding biology of Asian House Martin Delichon dasypus in a high-elevation area ZHIXIN ZHOU, YUE SUN, LU DONG, CANWEI XIA, HUW LLOYD & YANYUN ZHANG We present data on the breeding biology of the largest known colony of Asian House Martin Delichon dasypus, located in the Jiangxi Wuyishan Nature Reserve at 2,158 m in the Huanggang Mountains, China. Nest surveys conducted in abandoned buildings in a subalpine meadow during March–August 2007 and 2008 yielded 163 and 132 clutches, from 84 and 82 nests, respectively. Breeding pairs also laid multiple broods and replacement clutches. Average clutch size was 3.0 and 2.6 eggs for first and second broods respectively. Synchronous hatching was detected in 79% of clutches. The proportion of eggs hatching was 0.7 and 0.6 for first and second broods respectively, and the proportion fledging was 0.5 and 0.4 respectively. Nests situated inside buildings were more successful than those situated outside owing to greater protection from severe weather, which was the major cause of breeding failure. Nest losses caused by severe weather were more pronounced later in the breeding season. INTRODUCTION Nest surveys The 3-ha study area is predominately subalpine meadow habitat in Many bird species raise only one brood per year because of a narrow which are situated more than 30 abandoned buildings and garages period of suitable environmental conditions which prohibits that provide suitable nesting substrate for the breeding martins. The multiple breeding attempts (Evans-Ogden & Stutchbury 1996). nest of Asian House Martin is a closed cup typical of hirundines, Others raise multiple broods per breeding season (Verhulst et al.
    [Show full text]
  • South American Migrant Swallows of the Genus Progne in Panama and Northern South America; with Comments on Their Identification and Molt
    528 GeneralNotes LVol.•- Auk?õ wing stretch movement (Eibl-Eibesfeldt and Kramer, Quart. Rev. Biol., 33: 181-211,1958). Woodpeckersdo this in an atypicalmanner. All oœmy captive individualsstretch one wing way down without any movementof either foot. One has to be in a favorableposition to see this clearly. It is more difficult to observein the field, but on one occasionI watcheda Pileated Woodpeckerdo a wing stretchwhile both of its feet were clampedwidely apart on a tree trunk. It remained in view during the extreme downward movement of the wing. Koenig has photographeda Bee-eater (Meropsapiaster) wing-stretchingin this manner (Nature Storiesfrom the Vienna Woods. Crowell. New York. 1958).-- Lnw•.•Nc• K•LH•,M,7815 AberdeenRoad, Bethesda14, Maryland. Ash-throated Flycatcher in Alabama.--S. W. Simon (Auk, 75: 469, 1958)sum- marizesthe recordsof the Ash-throatedFlycatcher (Myiarchusciner•cens) east of the MississippiRiver in the United States-sevenspecimens and two sight recordsare listed. To this growinglist I would add a specimenI collected November2, 1958at Dauphin Island, Alabama. The specimenwas identifiedat the LouisianaState University Museum of Natural History by Dr. Robert J. Newmanas Myiarchuscinerascens cinerascens. The specimenis now No. 4645.1a in the Florida State University bird collection. This is the first record of the speciesin Alabama (Thomas A. Imhof, personalcommunication).--Love•-r E. W•n•ss, JR., Wildli[e ResearchUnit, A•PJ., Auburn, Alabama. N ew Record of the Eastern Barn Swallow in Mieronesia.--The Eastern Barn Swallow (Hitundo rustics gutturalis), which normally winters as far south as Australia,has been reportedas a fall and winter migrant in westernMi•onesia by severalobservers.
    [Show full text]
  • P0395-P0400.Pdf
    TheCondor95:395-400 0 The Cooper Omthological Soaety 1993 AN EXPERIMENTAL TEST OF THE CONTRASTING-COLOR HYPOTHESIS OF RED-BAND EFFECTS IN RED-WINGED BLACKBIRDS ’ KAREN J. METZ AND PATRICK J. WEATHERHEAD Department of Biology, Carleton University,Ottawa, Ontario KlS 5B6, Canada Abstract. We performed an experiment to investigate effects of red leg bands on the behavior of male Red-winged Blackbirds(Agelaiusphoeniceus). We presentedmodels having either black, blue, or red leg bands to territorial male Red-winged Blackbirds to test the hypothesisthat any color of band that contrastswith the color of the legsmakes an individual appear abnormal or unhealthy and therefore subject to attack. Overall, territorial males respondedequally aggressivelyto the black- and blue-banded models, but spent more time at distancesgreater than 10 m, displayedat lower intensities, and took longer to attack when the model was given red bands. Thus, red bands appearedto make the model initially more threatening to territorial male Red-winged Blackbirds. These results do not support the contrasting-color hypothesis and suggestthat the effect of red bands is attributable to the bands matching the color of the male’s epaulets. The failure of the contrasting-color hy- pothesisalso leaves unresolvedthe different outcomesof one previous experiment showing a negative effect of red bands, and two analysesof long-term banding studiesthat detected no effect of red bands. Key words: Red-wingedBlackbird; Agelaius phoeniceus;epaulets; colored bands. INTRODUCTION than red-banded males with smaller epaulets We recently demonstrated that red leg bands se- (Metz and Weatherhead 199 1). The causeof the verely reduced the ability of male Red-winged territory loss appeared to be increased and more Blackbirds(Ageluiusphocnicrus) to maintain their persistent intrusion by other males, particularly territories, unlike black bands which had no no- territorial neighbors.
    [Show full text]
  • Color Change in Hughes's Celluloid Leg Bands
    j. Field Ornithol., 66(2):289-295 COLOR CHANGE IN HUGHES'S CELLULOID LEG BANDS GERALD D. LINDSEY, KAREN A. WILSON AND CHRISTINA HERRMANN National BiologicalSurvey Alaska Science Center Hawaii Field Station P.O. Box 44 Hawaii National Park, Hawaii 96718 USA Abstract.--Colorchange was recorded in 10 colorsfor 237 Hughescelluloid bands attached to the tarsi of 84 birds for up to 5 yr and for 45 celluloid bands exposedto natural sunlight on Mauna Kea, Hawaii. Colors of four solid-coloredbands (mauve, light green, yellow and black) and two split-coloredbands (orange/dark green and dark blue/white) attached to free-flyingbirds were still recognizable->3 yr. Within 2-3 yr, light blue, orange and red solid- colored bands and a red/white split-coloredband had faded and could be confusedwith other colors.For studies--<2 yr, most Hughes celluloid bands retained enough color to be recognizedunder field conditions.For long-termstudies, biologists should select only those colorsthat can be recognizedfor the duration of the studyor useanother type of color band that is more resistantto fading or discoloration. CAMBIO EN COLORACION DE BANDAS HUGHES Sinopsis.--Seencontr6 cambio en la coloraci6nde 237 bandasplfisticas Hughes de 10 colores diferentesque estuvieroncolocadas pot cinco aftosen el tarsode 84 pfijarosy de 45 bandas expuestasa la luz natural en Mauna Kea, Hawaii. Bandasde cuatro coloress61idos y de dos coloresmixtos pudieron ser reconocidasluego de haber estadopor m'fisde 3 aftos en las patas de avessilvestres. No obstante, entre 2-3 aftos,las bandas de colores s61idoscomo el azul p'filido,anaranjado, rojo y bandasde coloresmixtos como el rojo/blanco hab/an cam- biado hastael punto de poder set confundidascon otros colores.Para estudios<2 aftos,las bandasHughes retienen el suficientecolor para poder set reconocidasen traba.jos de campo.
    [Show full text]