Status of the American and Lesser Scaup Ducks in Ohio

Total Page:16

File Type:pdf, Size:1020Kb

Status of the American and Lesser Scaup Ducks in Ohio Vol. XL'VIII1 j No. 257 a LesserScaup Duck swimmingabout. We approachedslowly and were ableto verify it as this form, the bird flying then alighting,flying and again alightingon the lake. It wasa malebird and the latenessof the date made us wonderif it couldbe possiblethat this speciesnested anywhere as far south as this. Giles, a very careful observer,had recorded 14 of these birds, 6 male• and 8 females,on this samelake on June 11, 1930; and had recordsfor June10, 11, 12, 13, and 15, 1929 alsoon Lake Rabun. Arthur H. Howell in 'Birds of Alabama' givesseveral records around the middle of May and Thos. D. Burleigh,writing from Athens, Ga., says:"A rather un- expectedrecord was that of three birds, all females,seen June 21, 1926." Probablythe bird we sawon June28 was a very late migrant or liked the high altitude of north Georgiabetter than a sectionfurther north among its kindred.--EARLER. GREENE,6/• OrmeCircle, Atlanta, Ga. Status of the American and Lesser Scaup Ducks in Ohio.--Consider- able confusionstill existsamong Ohio ornithologisteand sportsmencon- cerningthe relative numbersand abundanceof the AmericanScaup Duck (NFroc• •/l• •arct•) and the LesserScaup Duck (Nyroca Of the former,Dr. Wheaton('Report on the Birdsof Ohio,'1879, p. 530) saysit is a "not uncommonspring and fall migrant in the interior of the State; more commonon Lake Erie, but nowhereabundant." Jonesin 'TheBirds of Ohio,'1903, p. 42and Dawson's 'Birds of Ohio,'1903, p. 604 statesthat in his experiencethe ScaupDuck is about one-fourthas numer- ous as the LesserScaup, especially in northernOhio. Amongthe sporte- men a largespecimen of the LesserScaup is usuallycalled a '•Big Bluebill" whilea smallindividual is a "Little Bluebill." It is agreedthat at present the LesserScaup Duck is one of, if not, the mostcommon Duck occurring in Ohio. During the past sevenyears I have made quite an effort, as have other membersof the WheatonClub of Columbus,to compiledata in regard to thesetwo species.At BuckeyeLake, in the centralpart of Ohio,I examined and measured106 Bluebills,most of which were shot by sportsmen. All of thesewere LesserScaup Ducks. Though the majority were taken in the fall huntingseason, considerable effort was made during the rest of the yearto collectany bird whichlooked suspiciously like the AmericanSeaup. On a few occasionsDucks have been noted which surelywere American Scaups,but in eachcase it was impossibleto collectthem. Somework was also conductedin the SanduskyBay marsheson Lake Erie, especiallyat East Harbor, duringthe latter part of the hunting seasonsof 1924, 1925, and 1926. Though over 250 LesserScaups were handledand measured,no AmericanScaups were found. A number of sportsmen have describedto me a bird taken on rare occasionsin this region,which by its sizemust have been the "Big Bluebill." I have been unableto find an AmericanScaup taken in Ohio, in the Museumsand other collectionsscattered over the State, thougha number of birdswere found labeled American Scaup which in reality were Lesser. 258 Auk At present the Ohio State Museum has 27 specimensof Lesser Scaups from Ohio, from the collectionsof Wheaton, Jasper, Davie, HenningeL and other more recent collectors. I• therefore appears that the American Scaup is one of the rarer of Ohio Ducks, being much less common than usually considered.--MiLTON B. TRAUTMAN,Ohio Division of Conservation,Columbus, Ohio, The American Scoter (Oidemia americana) Again in Winter on the South Carolina Coast.--In 'The Auk' for April, 1929, the writer recordedthe third observanceof this speciesin South Carolina. Since that time additional recordshave strongly indicated that this speciesis on the increasealong the SouthAtlantic coast,certainly as far downas Charleston. These records cover a considerablerange of season;the first one after the above mentionedone occurringon April 6, 1929 when a fine male was taken alive at the same island where the writer and Mr. Weston saw the flock of eight mentioned in the April 'Auk.' This specimenwas securedby Mr. Isaac Grimball and was presentedto the Charleston Museum. In Decem- ber, 1929flocks of the AmericanScorer were seenin Bull's Bay by Mr. E. Milby Burton and two companions,several of the birds being taken ('Auk,' April, 1930). During this past year, the writer s•w this specieson two occasionsoff Folly Island, in huge flocks, sometimesso closein that the birds could be seeneasily without the aid of glasses,playing and swimmingjust beyond the surf line. The dates are December 20, 1930; January 17, 1931. For three consecutive winters AmeriCan Scoters have been noted on the South Carolina coast and are probably to be included in the number of winter residents.--A•E•ER SrRmzr, JR., 92 South Battery, Charleston,S.C. Black-bellied and Fulvous Tree Duck, in Illinois.--On September 15, 1930, a Black-belliedTree Duck (Dendrocygnaautumnalis) was shot, by a hunter, from a tree along the Illinois river, near LaSalle, Illinois. This bird, the sex of which could not be determined,was brought in to a local taxidermist and mounted by him. In mentioning the above to a friend of mine who is also a commercial taxidermist, he told me that someyears ago he mounted a Fulvous Tree Duck (Dendrocygnabicolor) which was brought in to him. We lookedthis bird up in his recordsand found that it was a male, killed off the Gov- ernmentPier, in Chicago,on December7, 1919. Both these birds looked to be healthy, were in goodplumage and did not show any signs of being kept in captivity, although there is a possi- bility of their being caged birds at one time, a fact though of which no one can feel certain.--JoHN WILLIAM MoYER, Field Museum of Natu•'al History, Chicago,Illinois. Lesser Snow Geese in Barry County, Michigan.---On October 21, 1930, two Snow Geesewere shot from a flock of twenty-five,at Crooked Lake, Barry County, Michigan, by J. D. Langworthy of Battle Creek. .
Recommended publications
  • Migration Chronology of Waterfowl in the Southern High Plains of Texas
    Migration Chronology of Waterfowl in the Southern High Plains of Texas LAURA BAAR1,2, RAYMOND S. MATLACK1,3, WILLIAM P. JOHNSON4 AND RAYMOND B. BARRON1 1Department of Life, Earth and Environmental Sciences, West Texas A&M University, Box 60808, Canyon, TX 79016-0001 2Current address: Texas Parks and Wildlife Department, P.O.Box 226, Karnack, TX 75661 3Corresponding author; Internet: [email protected] 4Texas Parks and Wildlife Department, P.O. Box 659, Canyon, TX 79015 Abstract.—Migration chronology was quantified for 15 waterfowl species on 58 playa wetlands in the Southern High Plains of Texas from February 2004 through April 2006. Abundance of each species was estimated on playas once every two weeks during the nonbreeding season (16 August to 30 April); presence of ice was also recorded. Dabbling ducks were most common (N = 250,668) and most tended to exhibit either a bimodal migration pattern (lower abundance in winter than during fall and spring passage) or a unimodal pattern (one defined peak). Abun- dance of the most common dabbling ducks was skewed toward late winter and spring. Most species of diving ducks (N = 15,128) tended to exhibit irregular migration patterns. Canada Geese (both Branta canadensis and B. hutchinsii, N = 15,347) had an abundance pattern that gradually increased, peaking in midwinter, and then decreased, which is typical for a terminal wintering area. Ice was most common on playas during the first half of December, which coincided with the lowest winter abundance in dabbling ducks. Data from this study will support management ef- forts focused on playa wetlands, including the development of population goals and habitat objectives that span the entire non-breeding season.
    [Show full text]
  • Utilization of Hydrilla Verticillata by Wintering Waterfowl on the Tidal Potomac River
    UTILIZATION OF HYDRILLA VERTICILLATA BY WINTERING WATERFOWL ON THE TIDAL POTOMAC RIVER by Jeffrey A. Browning Advisor: Dr. Albert Manville Presented to the Faculty of the Graduate School of Johns Hopkins University In Partial Fulfillment of the Requirements For the Degree of Master of Science Johns Hopkins University May 2008 ABSTRACT Submersed aquatic vegetation (SAV) communities in the tidal Potomac River were decimated during the 20th century by multiple environmental and anthropogenic factors. With the major declines of SAV communities, waterfowl populations have declined greatly as well (Hindman 1989). Hydrilla verticillata, an introduced submersed aquatic plant, was first discovered in the tidal Potomac River in 1982 (Steward et al. 1984). One hundred nine waterfowl were collected from the tidal Potomac River and its tributaries during the 2007-2008 Virginian and Maryland waterfowl hunting seasons. The esophagi and gizzards were dissected and analyzed to determine the utilization of H. verticillata by wintering waterfowl. Only 2 duck species, Mallard (Anas platyrhynchos) and Lesser Scaup (Aythya affinis), consumed small amounts of H. verticillata, 2.52% and 0.20% aggregate percentage of esophageal content, respectively. An inverse relationship between H. verticillata and gastropod consumption was observed as the season progressed. i ACKNOWLEDGMENTS I would like to thank Dr. Albert Manville for his guidance and input during this research. Dr. Manville helped me reach decisions and get past certain obstacles. I would also like to thank Dr. Matthew Perry and Mr. Peter Osenton at the USGS Patuxent Wildlife Research Center for advice and consultation during the design of this study and analysis of the data.
    [Show full text]
  • Waterfowl in Iowa, Overview
    STATE OF IOWA 1977 WATERFOWL IN IOWA By JACK W MUSGROVE Director DIVISION OF MUSEUM AND ARCHIVES STATE HISTORICAL DEPARTMENT and MARY R MUSGROVE Illustrated by MAYNARD F REECE Printed for STATE CONSERVATION COMMISSION DES MOINES, IOWA Copyright 1943 Copyright 1947 Copyright 1953 Copyright 1961 Copyright 1977 Published by the STATE OF IOWA Des Moines Fifth Edition FOREWORD Since the origin of man the migratory flight of waterfowl has fired his imagination. Undoubtedly the hungry caveman, as he watched wave after wave of ducks and geese pass overhead, felt a thrill, and his dull brain questioned, “Whither and why?” The same age - old attraction each spring and fall turns thousands of faces skyward when flocks of Canada geese fly over. In historic times Iowa was the nesting ground of countless flocks of ducks, geese, and swans. Much of the marshland that was their home has been tiled and has disappeared under the corn planter. However, this state is still the summer home of many species, and restoration of various areas is annually increasing the number. Iowa is more important as a cafeteria for the ducks on their semiannual flights than as a nesting ground, and multitudes of them stop in this state to feed and grow fat on waste grain. The interest in waterfowl may be observed each spring during the blue and snow goose flight along the Missouri River, where thousands of spectators gather to watch the flight. There are many bird study clubs in the state with large memberships, as well as hundreds of unaffiliated ornithologists who spend much of their leisure time observing birds.
    [Show full text]
  • North American Game Birds Or Animals
    North American Game Birds & Game Animals LARGE GAME Bear: Black Bear, Brown Bear, Grizzly Bear, Polar Bear Goat: bezoar goat, ibex, mountain goat, Rocky Mountain goat Bison, Wood Bison Moose, including Shiras Moose Caribou: Barren Ground Caribou, Dolphin Caribou, Union Caribou, Muskox Woodland Caribou Pronghorn Mountain Lion Sheep: Barbary Sheep, Bighorn Deer: Axis Deer, Black-tailed Deer, Sheep, California Bighorn Sheep, Chital, Columbian Black-tailed Deer, Dall’s Sheep, Desert Bighorn Mule Deer, White-tailed Deer Sheep, Lanai Mouflon Sheep, Nelson Bighorn Sheep, Rocky Elk: Rocky Mountain Elk, Tule Elk Mountain Bighorn Sheep, Stone Sheep, Thinhorn Mountain Sheep Gemsbok SMALL GAME Armadillo Marmot, including Alaska marmot, groundhog, hoary marmot, Badger woodchuck Beaver Marten, including American marten and pine marten Bobcat Mink North American Civet Cat/Ring- tailed Cat, Spotted Skunk Mole Coyote Mouse Ferret, feral ferret Muskrat Fisher Nutria Fox: arctic fox, gray fox, red fox, swift Opossum fox Pig: feral swine, javelina, wild boar, Lynx wild hogs, wild pigs Pika Skunk, including Striped Skunk Porcupine and Spotted Skunk Prairie Dog: Black-tailed Prairie Squirrel: Abert’s Squirrel, Black Dogs, Gunnison’s Prairie Dogs, Squirrel, Columbian Ground White-tailed Prairie Dogs Squirrel, Gray Squirrel, Flying Squirrel, Fox Squirrel, Ground Rabbit & Hare: Arctic Hare, Black- Squirrel, Pine Squirrel, Red Squirrel, tailed Jackrabbit, Cottontail Rabbit, Richardson’s Ground Squirrel, Tree Belgian Hare, European
    [Show full text]
  • Greater and Lesser Scaup: Beyond Crown Shape
    IN THE SCOPE Greater and Lesser Scaup: Beyond Crown Shape Tony Leukering Despite the fact that separation of Greater and Lesser Scaup has bedeviled generations of birders, the problem has not been particu- larly well treated in the primary birding literature. The recent treat- ment of the subject in Barry et al. (2006) does a better job than most, but nearly lacks illustrations. As part of a larger effort by me and oth- ers to provide a more thorough treatment of the problem, this essay summarizes some of the key aspects of head shape that make scaup identification in the field much more efficient and accurate than rely- ing solely on the shape of the crown in profile. The primary problem with using crown shape to identify scaup is that crown shape is malleable, varying according to the whim and ac- tivity of the individual bird in question. Birds at rest are much more likely to exhibit the stereotypical crown shape than are active birds. In fact, if birders only looked at actively-foraging scaup (that is, indi- vidual birds that spend less time at the water’s surface than beneath it) and only used crown shape to determine identification, we would believe that Lesser Scaup is quite rare. That is because actively-forag- ing scaup tend to hold their head feathers more depressed, presenting Back Cover Photo Key Upper left photo: Female (left) and first-year male (right) Greater Scaup, Palo Alto, Santa Clara Co., CA; 2 March 2009; photograph by Tony Leukering Greater Scaup (left, all rows) and Lesser Scaup (right, all rows).
    [Show full text]
  • Canvasback and Lesser Scaup Activities and Habitat-Use on Pool 19, Upper Mississippi River
    Transactions of the Illinois State Academy of Science (1993), Volume 86, 1 and 2, pp. 33 - 45 Canvasback and Lesser Scaup Activities and Habitat-Use on Pool 19, Upper Mississippi River David M. Day1, Richard V. Anderson and Michael A. Romano Department of Biological Sciences Western Illinois University Macomb, IL 61455 1Current address: Illinois Department of Conservation Streams Program Aledo, IL 61231 ABSTRACT Behavior and habitat use of canvasback (Aythya valisineria) and lesser scaup (Aythya affinis) were assessed on Pool 19 of the Upper Mississippi River during the spring and fall of 1982 and the spring of 1983. Ducks were frequently observed in three sections of the study area; on the Illinois side of the river from Hamilton to Nauvoo; between Montrose and Niota; and in spring near Dallas City. Resting behavior was most prevalent, followed by diving (feeding) and loafing (sleeping). Lesser scaup dove more and spent less time loafing than canvasbacks. For all three seasons, within nonvegetated habitat, no significant seasonal or behavioral differences were found between male and female canvasbacks, but significant differences were found between the sexes of lesser scaup. Differences in activities between male and female lesser scaup did not persist when fall observations were excluded, suggesting seasonal differences in use of Pool 19. No significant seasonal or behavioral differences between species were observed in ducks using submergent vegetation during the spring periods. Activity patterns for both species, during the combined spring periods, were significantly different between submergent vegetation and nonvegetated areas. It appears these differences were due largely to changes in the distribution of diving and loafing activities between habitats.
    [Show full text]
  • Subspecies of the Greater Scaup and Their Names’
    Wilson Bull., 98(3), 1986, pp. 433444 SUBSPECIES OF THE GREATER SCAUP AND THEIR NAMES’ RICHARD C. BANKS* ABSTRACT.-The name Fuligula mariloides Vigors, presently used by many authors for a subspecies of the Greater Scaup, Aythya marila, was originally proposed for the Lesser Scaup, A. afinis, and may not be used in combination with the name marila. The name mariloides has been applied to a population of Greater Scaup in Kamchatka and the Com- mander Islands, supposedly distinguished by small size and dark dorsal color, or for that population and the one in North America, otherwise known as A. m. nearctica. Evidence for a subspecifically distinct population in eastern Asia is lacking, and A. marila is best considered to consist of only the Eurasian A. m. marila and the American A. m. nearctica. There is some interchange of the two subspecies in migration. Received 13 Dec. 1985, accepted 4 Mar. 1986. The American Ornithologists ’ Union (AOU 1957) used the name Ay- thya marila nearctica Stejneger, 18 8 5, for the North American subspecies of the Greater Scaup. More recent authorities use A. m. mariloides (Vig- ors, 1839) for the North American population (Bellrose 1976, Palmer 1976) or for a population in North America and eastern Asia (Johnsgard 1975, 1979). Others (Portenko 1972) recognize both an east Asian mar- iloides and an American nearctica in addition to the European A. m. marih, and still others (Vaurie 1965) treat A. marila as monotypic. Who is correct? The name Anus marila was applied by Linnaeus (176 1) to the Scaup Duck of Europe, the species now called in North America the Greater Scaup.
    [Show full text]
  • Reliability of Determining Adults from Juvenile Ducks by Presence Or Absence of Notched Tail Feathers in Various Species of Nort
    Louisiana State University LSU Digital Commons LSU Master's Theses Graduate School 2006 Reliability of determining adults from juvenile ducks by presence or absence of notched tail feathers in various species of North American ducks Thomas Michael Siwarski Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_theses Part of the Environmental Sciences Commons Recommended Citation Siwarski, Thomas Michael, "Reliability of determining adults from juvenile ducks by presence or absence of notched tail feathers in various species of North American ducks" (2006). LSU Master's Theses. 2905. https://digitalcommons.lsu.edu/gradschool_theses/2905 This Thesis is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Master's Theses by an authorized graduate school editor of LSU Digital Commons. For more information, please contact [email protected]. RELIABLITY OF DETERMINING ADULTS FROM JUVENILE DUCKS BY PRESENCE OR ABSENCE OF NOTCHED TAIL FEATHERS IN VARIOUS SPECIES OF NORTH AMERICAN DUCKS A Thesis Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Science In The School of Renewable Natural Resources By Thomas Michael Siwarski Jr. B.S., University of Wisconsin Stevens Point, 2003 May 2006 ACKNOWLEDGMENTS I would first like to thank my parents, Tom and Kim Siwarski, without their support and guidance I would not be where I am today. I would also like to thank my fiancé, Nora Doval, for standing by me for the last two years while I was bouncing all over the country collecting dead ducks.
    [Show full text]
  • (Aythya Affinis) at Red Rock Lakes National Wildlife Refuge
    Utah State University DigitalCommons@USU All Graduate Theses and Dissertations Graduate Studies 5-2018 Breeding Season Ecology and Demography of Lesser Scaup (Aythya affinis) at Red Rock Lakes National Wildlife Refuge Jeffrey M. Warren Utah State University Follow this and additional works at: https://digitalcommons.usu.edu/etd Part of the Biology Commons, Medicine and Health Sciences Commons, and the Natural Resources and Conservation Commons Recommended Citation Warren, Jeffrey M., "Breeding Season Ecology and Demography of Lesser Scaup (Aythya affinis) at Red Rock Lakes National Wildlife Refuge" (2018). All Graduate Theses and Dissertations. 6928. https://digitalcommons.usu.edu/etd/6928 This Dissertation is brought to you for free and open access by the Graduate Studies at DigitalCommons@USU. It has been accepted for inclusion in All Graduate Theses and Dissertations by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. BREEDING SEASON ECOLOGY AND DEMOGRAPHY OF LESSER SCAUP (Aythya affinis) AT RED ROCK LAKES NATIONAL WILDLIFE REFUGE by Jeffrey M. Warren A dissertation proposal submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY in Wildlife Biology Approved: _______________________ ________________________ David N. Koons, Ph.D. Phaedra Budy, Ph.D. Major Professor Committee Member _______________________ ________________________ James A. Dubovsky, Ph.D. Susannah S. French, Ph.D. Committee Member Committee Member _______________________ Frank P. Howe, Ph.D. Mark R. McLellan, Ph.D. Committee Member Vice President for Research and Dean of the School of Graduate Studies UTAH STATE UNIVERSITY Logan, Utah 2018 ii Copyright © Jeffrey M. Warren 2018 All Rights Reserved iii ABSTRACT Breeding Season Ecology and Demography of Lesser Scaup (Aythya affinis) at Red Rock Lakes National Wildlife Refuge by Jeffrey M.
    [Show full text]
  • Alpha Codes for 2168 Bird Species (And 113 Non-Species Taxa) in Accordance with the 62Nd AOU Supplement (2021), Sorted Taxonomically
    Four-letter (English Name) and Six-letter (Scientific Name) Alpha Codes for 2168 Bird Species (and 113 Non-Species Taxa) in accordance with the 62nd AOU Supplement (2021), sorted taxonomically Prepared by Peter Pyle and David F. DeSante The Institute for Bird Populations www.birdpop.org ENGLISH NAME 4-LETTER CODE SCIENTIFIC NAME 6-LETTER CODE Highland Tinamou HITI Nothocercus bonapartei NOTBON Great Tinamou GRTI Tinamus major TINMAJ Little Tinamou LITI Crypturellus soui CRYSOU Thicket Tinamou THTI Crypturellus cinnamomeus CRYCIN Slaty-breasted Tinamou SBTI Crypturellus boucardi CRYBOU Choco Tinamou CHTI Crypturellus kerriae CRYKER White-faced Whistling-Duck WFWD Dendrocygna viduata DENVID Black-bellied Whistling-Duck BBWD Dendrocygna autumnalis DENAUT West Indian Whistling-Duck WIWD Dendrocygna arborea DENARB Fulvous Whistling-Duck FUWD Dendrocygna bicolor DENBIC Emperor Goose EMGO Anser canagicus ANSCAN Snow Goose SNGO Anser caerulescens ANSCAE + Lesser Snow Goose White-morph LSGW Anser caerulescens caerulescens ANSCCA + Lesser Snow Goose Intermediate-morph LSGI Anser caerulescens caerulescens ANSCCA + Lesser Snow Goose Blue-morph LSGB Anser caerulescens caerulescens ANSCCA + Greater Snow Goose White-morph GSGW Anser caerulescens atlantica ANSCAT + Greater Snow Goose Intermediate-morph GSGI Anser caerulescens atlantica ANSCAT + Greater Snow Goose Blue-morph GSGB Anser caerulescens atlantica ANSCAT + Snow X Ross's Goose Hybrid SRGH Anser caerulescens x rossii ANSCAR + Snow/Ross's Goose SRGO Anser caerulescens/rossii ANSCRO Ross's Goose
    [Show full text]
  • Nutrient Reserves of Lesser Scaup During Spring Migration in the Mississippi Flyway: a Test of the Spring Condition Hypothesis Michael J
    Louisiana State University LSU Digital Commons LSU Master's Theses Graduate School 2002 Nutrient reserves of lesser scaup during spring migration in the Mississippi Flyway: a test of the spring condition hypothesis Michael J. Anteau Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_theses Part of the Environmental Sciences Commons Recommended Citation Anteau, Michael J., "Nutrient reserves of lesser scaup during spring migration in the Mississippi Flyway: a test of the spring condition hypothesis" (2002). LSU Master's Theses. 3191. https://digitalcommons.lsu.edu/gradschool_theses/3191 This Thesis is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Master's Theses by an authorized graduate school editor of LSU Digital Commons. For more information, please contact [email protected]. NUTRIENT RESERVES OF LESSER SCAUP DURING SPRING MIGRATION IN THE MISSISSIPPI FLYWAY: A TEST OF THE SPRING CONDITION HYPOTHESIS A Thesis Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the degree of Master of Science in The School of Renewable Natural Resources by Michael J. Anteau B.S., Wildlife Biology, University of Alaska Fairbanks, 1997 B.S., Biological Sciences, University of Alaska Fairbanks, 1997 August 2002 DEDICATION This thesis is dedicated to my wife, Andrea C. E. Anteau; for her moral, financial, and emotional support throughout my work. She has proven her dedication to me and my endeavors, with countless hours volunteering in the lab.
    [Show full text]
  • Lesser Scaup Aythya Affinis
    Lesser Scaup Aythya affinis Class: Aves Order: Anseriformes Family: Anatidae Characteristics: Lesser scaup are one of two scaup species in North America. While the greater scaup tends to prefer salt water, the lesser prefers freshwater and is only found in North and South America. It is a medium-sized diving duck with a slight bump on the peak of the head. The male has a bluish bill, black head, neck, chest and rear end and grey sides. The female is brown but is identified by the white patch at the base of the bill. Behavior: Scaup are diving ducks, which means they will dive completely under the water to find food. Like many ducks, the female and male have distinct calls. They are social, nonaggressive birds that will live together in large Range & Habitat: flocks. Lakes and ponds in fresh or brackish water Reproduction: They make a ground nest either on the ground or will also construct a mound of vegetation over water. The female lay 6-14 eggs that hatch following an incubation period of about 30 days. Ducklings can actually dive and start feeding themselves as soon as they are dry out of the egg. Diet: Wild: Clams, snails, crustaceans, aquatic insects, aquatic plants and seeds Zoo: Seabird diet, scratch grains, flock raiser pellets, greens Conservation: Widely found throughout North and into South America, lesser scaup are Least Concern. Lifespan: up to 20 years in captivity, 15 years in the wild. FYI: Lesser scaup are one of the most widespread diving ducks in North Special Adaptations: Scaup will “play dead” when grasped by a America (Cornell Lab of Ornithology).
    [Show full text]