DOCSLIB.ORG

106-119 OB Vol 20#3 Dec2002.Pdf

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
106-119 OB Vol 20#3 Dec2002.Pdf 106 Articles Breeding Records of Eared Grebe in Ontario Glenn Coady, Mark K. Peck, David H. Elder, and Brian Ratcliff INTRODUCTION disjunct population in southern The Eared Grebe (Podiceps nigri­ Yukon (Jones 1985); southern collis) is the most numerous and Saskatchewan north to Kazan Lake widespread of the world's grebe and Nipawin (Smith 1996); south­ species (del Hoyo et al. 1992). It western Manitoba north to Shoal comprises three subspecies. The Lake (Salt and Salt 1976) and in nominate subspecies (P. n. nigricol­ extreme northwestern Ontario in lis) breeds locally throughout much the Rainy River area (Elder and of Eurasia from Britain and south­ Simms 1997). It breeds in the ern Scandinavia east to western United States along the Canadian Siberia, and south to Iraq, border between southeastern Afghanistan, Manchuria, India and Washington (Smith 1996), Montana, Pakistan. It also breeds in Africa North Dakota (Stewart 1975) and from Morocco in the west to the western Minnesota (Janssen 1987; Rift Valley from Ethiopia to north­ Boe 1992, 1994) and south to north­ ern Tanzania in the east (Cullen et western Iowa (Dinsmore et al. 1984, al. 1999). Another subspecies (P. n. Dinsmore 1996), central Nebraska gurneyi) breeds in South Africa (Johnsgard 1979), eastern Colorado (Transvaal to Cape Province), (Nelson 1998), northwestern New Angola, Mozambique and Namibia Mexico (Hubbard 1978), northeast­ (Harrison 1983, O'Donnel and ern Arizona (Monson and Phillips Fjeldsa 1997). 1981), and west through Utah All Eared Grebes in the west­ (Hayward et al. 1976), southern ern hemisphere belong to a third Idaho (Stephens and Sturts 1997), subspecies (P. n. californicus) which northern Nevada (Alcorn 1988), breeds in Canada in the British southeastern Oregon (Gilligan et al. Columbia interior (Okanagan 1994), and northeastern California Valley, Kootenay Region, Peace and the Central Valley (Small 1994) River lowlands) (Campbell et al. southwest into northern Baja 1990); Alberta, east of the Rocky California (American Ornithologists' Mountains, as far north as Fort Union 1998). It has bred sporadically Vermillion (Semenchuk 1992); a east to Wisconsin (Robbins 1991), ONTARIO BIRDS DECEMBER 2002 107 northwestern Illinois (Bohlen 1989) poses of this paper are to document and central Texas (Oberholser 1974), this Eared Grebe nest, detail some and possibly Michigan (Adams 1991, aspects of breeding biology noted Granlund 1991). Apart from the during these observations, and sum­ northwestern Mexico range, an iso­ marize the previous breeding lated population also breeds locally records for Eared Grebe in in central Mexico (Dickerman 1969, Ontario. Wilson et al. 1988). In Ontario, the Eared Grebe OBSERVATIONS was the last species of grebe to be Emo, Rainy River added to the provincial bird check­ David Elder discovered a pair of list. Ontario's first record of Eared Eared Grebes in the east pond of Grebe involved a pair of birds the Emo sewage lagoons on 31 May observed on 28 April 1948 by 2001 prior to leading an Ontario George W. North in Hamilton Bay, Field Ornithologists trip in Rainy off Carroll's Point, Woodland River (Roy 2002). He observed a Cemetery, Hamilton-Wentworth pair of birds on the same lagoon on (Baillie 1957). In each subsequent 2 June 2001. decade, the number of Eared Grebe On 3 June 2001 at 1230h, Glenn sightings in Ontario has increased, to Coady visited the Emo sewage the point where it is now considered lagoons at the start of a two week a rare annual migrant in both spring field trip to the Rainy River area on and fall, an occasional winter strag­ behalf of the Ontario Breeding gler in the lower Great Lakes, and a Bird Atlas. He noted an Eared rare summer resident at Rainy River Grebe foraging in the east pond, (James et al. 1976, James 1991). In and while circling around the west 1990, twenty-one records of Eared side of that pond, flushed a second Grebe were noted in Ontario (Weir Eared Grebe from shore out into 1991). The first confirmed nesting of the pond. It emerged from the Eared Grebe in Ontario occurred at water in a very vertical fashion, beat the Emo sewage lagoons, Rainy both feet on the water sending up a River, in 1996 when two young visible spray, and submerged in a fledged from a single nest (Elder folding "crash dive" similar to that and Simms 1997). described by Cullen et al. (1999) as In 2001, the authors discovered a frequent response to nest distur­ an Eared Grebe nest at the Emo bance. A search of the area where sewage lagoons and two pairs of the bird appeared to have flushed Eared Grebes performing courtship revealed a partially hidden nest displays at the Rainy River sewage with four eggs, partly covered with lagoons during field work on behalf vegetation. The nest was a messy of the second Ontario Breeding pyramidal platform of mud and wet Bird Atlas (2001-2005). The pur- vegetation on a bed of dead, bent- VOLUME 20 NUMBER 3 108 over cattail (Typha sp.) leaves within On 7 June 2001 at 1200h, Elder a stand of living cattail, on the and Brian Ratcliff independently perimeter of the sewage lagoon, very discovered this nest. Upon inspec­ close to the northwest corner of the tion, the nest was well covered with east pond. It was placed less than a vegetation, with at least one egg metre from the water's edge and was clearly visible, however. On arrival, about 15 cm above the water sur­ a pair of birds was present on the face, where the incubating adult east pond and they saw one of the could easily slip off into the water if two disappear into the cattails at disturbed. (Nest location: 15U the west end. They retreated to 438024 5387558 North American view the birds with a scope and saw Datum 1983; 48° 38' 16.8" N, 93° 50' a grebe return to the nest area. 28.5" W.) The four eggs were white When they examined this section of and showed some slight light brown the pond, Ratcliff was able to detect staining. They were partially hidden the incubating bird leaving the cov­ by algae and wet cattail leaves. To ered nest. minimize disturbance, no attempt On 7 June 2001 at 1400h, Coady was made to obtain nest or egg returned to the Emo lagoons and dimensions. The incubating bird noted both adult Eared Grebes still quickly returned to the nest within present and that the nest still con­ ten minutes and about an hour later tained four eggs. Both adult Eared the other member of the pair Grebes were observed to harass a assumed incubation duties. When not lone American Coot (Fulica ameri­ incubating, the birds spent the major­ cana) in the breeding pond, repeat­ ity of the time foraging. They were edly attacking it from beneath the often seen surface feeding or making water surface, and eventually driv­ a series of short (10-15 second) ing it out to the other lagoon, likely dives, often in the same favoured in defense of their nesting territory. feeding location on the pond. Such The American Coot is the most short dive times are typical when for­ prevalent predator of Eared Grebe aging in shallow ponds (Sealy 1985). nests, eating eggs or often damaging Eared Grebes consume a wide them to usurp unguarded nest sites assortment of aquatic prey, primarily (Boe 1993). invertebrates such as insects (water On 7.June 2001 at 1500h, Mark boatmen, diving beetles, caddis fly Peck, George Peck and Roy Smith larvae, brine flies, mayflies, midges, also independently discovered this moths, damselflies, dragonflies) and nest and noted that it contained small crustaceans (particularly brine four eggs. They did not observe the shrimp in hypersaline environ­ American Coot in either pond. ments). They will less frequently con­ On 10 June 2001 at 1500h, sume small fish, molluscs and Coady, the Pecks and Smith amphibians (Cullen et al.1999). returned to Emo and observed the ONTARIO BIRDS DECEMBER 2002 109 Eared Grebe nest from a blind. fluctuating water levels as well as Mark Peck obtained still photo­ ground-based mammalian preda­ graphs of the incubating adult at tors, but leaves them at greater risk the nest (Figures 1 and 2) and of the of nest failure due to wind damage, nest and eggs (Figure 3). Coady which is common (Boe 1994). similarly obtained videotape docu­ This same group of observers mentation of the nest. It was noted returned to Emo upon departure that the water level was perhaps a from the Rainy River area on 16 few centimetres lower than on 7 June 2001 at 0830h. One Eared June, as the bird had to climb slight­ Grebe was noted foraging in the ly higher to reach the nest and was nest pond and the other bird was videotaped requiring two attempts assumed to be incubating. The to make the climb successfully on water level of the pond did not one occasion. Eared Grebes also appear appreciably different than it commonly build floating nests was on 7 June. anchored to submerged or emer­ On 28 June 2001, Elder gent vegetation over open water returned to Emo on the way to (Cullen et al. 1999). Clearly, this Winnipeg. He found that the water strategy poses advantages in terms level in the east pond was down of greater protection from both almost a metre in depth and that Figure 1: Adult Eared Grebe incubating nest at Emo sewage lagoon on 10 June 2001. Photo by Mark K. Peck. VOLUME 20 UMBER 3 110 Figure 2: Adult Eared Grebe inspecting clutch of four eggs at Emo sewage lagoon on 10 June 2001.
Load more

Recommended publications
  • Coyote Reservoir & Harvey Bear..…
    Coyote Reservoir & Harvey Bear..…. February 24, south Santa Clara County Quick Overview – Watching the weather reports we all saw the storm coming, but a group of adventurous souls arrived with all their rain gear and ready to go regardless of the elements, and what a day we had! Once east of Gilroy and traveling through the country roads we realized that soaking wet birds create unique ID challenges. With characteristic feathers in disarray and the wet plumages now appearing much darker we had to leave some questionable birds off our list. We had wanted to walk some of the trails that make up the new Harvey Bear Ranch Park, but the rain had us doing most of our birding from the cars which was easy along Coyote Reservoir Road as it parallels the lake. It also makes it easy when no one else is in the park. We could stop anywhere we wanted and we were not in anyone’s way – a birder’s dream come true! Watching Violet Green Swallows by the hundreds reminded us all that spring is near. And at one stop we got four woodpecker species. Ending our day watching Bald Eagles grasp fish at the surface of the water was worth our getting all wet! And I’ll not soon forget our close encounter with the dam’s Rufous Crowned Sparrow. Since we started our day at the south entrance of the park we ended Rufous Crowned Sparrow our day at the north entrance. It was here we listened to above and hard working Western Meadowlarks and watched a Say’s Phoebe.
    [Show full text]
  • Role of Habitat in the Distribution and Abundance of Marsh Birds
    s 542 .18 S74 no.;43 1965 Role of Habitat in the Distribution and Abundance of Marsh Birds by Milton W. Weller and Cecil S. Spatcher Department of Zoology and Entomology Special Report No. 43 Agricultural and Home Economics Experiment Station Iowa State University of Science and Technology Ames, Iowa- April 1965 IOWA STATE TRA YEUNG LIBRARY DES MOlNESt 'IOWA CONTENTS Summary ---------------------- -- --------------------------------------- --- ------------------------------ --- ----------- 4 Introduction ------------------- ---- ------ --- -------- ----- ------------------------------ ---------------------- --- ---- 5 Study areas --------- -- --- --- --- -------------------------------- ---------------------- ----------------------- --------- 5 Methods ----------- --- ----------- --------- ------------------------------------------------------- --- -------------------- 6 Vegetation ---------------------------- ------------ --- -------------------------- --- ------------------ -- -------- 6 Bird populations ---------------------------------------------------------------- -------------------------- 6 Results ______ _ __ ____ __ _ __ ___ __ __ __ ______ __ ___ ___ __ _ _ _ ____ __ __ ___ __ ______ __ __ _____ ______ ____ ___ __ _ _ ____ ___ _____ __ __ ___ ___ _ 6 Species composition and chronology of nesting -------------------------------------- 6 Habitat changes at Little Wall and Goose lakes ------ -------------------------------- 8 Bird populations in relation to habitat ----------- ---- ----------- -------------------------- 11 Distribution
    [Show full text]
  • Cooper's Hawk
    American Coot Although I look like a duck, I am part of the Coot family! Instead of webbed feet, I have chicken-like talons. I have a thick black body with a red eye and a white beak. I am a waterbird, and I am very aggressive and noisy. Great Egret I’m a Great White Egret! I have long, black legs and a very long neck, making me very tall. My feathers are a bright white, but my eyes are a piercing yellow. I like water, so I live in marshes, ponds, shores, and mudflats. Great Blue Heron I am a member of the Heron family. I have grayish-blue feathers, long legs and a large wingspan. My s-shaped neck makes me look hunched over. I’m adaptable and can live in marshes, swamps, shores and tide flats. Ruddy Duck I am recognizable by my bright blue bill! Females have brown bills. You can often find me in the water, diving for my food. I also have brown feathers, a black cap and white cheeks. I live in freshwater marshes, ponds and lakes. American Wigeon I am a member of the ducks and geese family. I have a pale blue beak, and a white crown on top of my brown speckled feathers. Since I am a male, I have a green patch on my eye. My habitat is the wetlands! I like living in marshes, lakes and bays. Mallard I am a part of the duck family. You’ve probably seen me before: I have a bright green head and a yellow beak! Females have brown and white feathers, making them better at camouflaging.
    [Show full text]
  • 2Nd Owl Symposium Importance of Prairie
    2nd Owl Symposium Importance of Prairie Wetlands and Avian Prey to Breeding Great Horned Owls (Bubo virginianus) in Northwestern North Dakota Robert K. Murphy 1 Abstract.—Prey use by Great Horned Owls (Bubo virginianus) is documented widely in North America, but not in the vast northern Great Plains. During spring through early summer 1986-1987, I recorded 2,900 prey items at 22 Great Horned Owl nesting areas in the prairie pothole farm- and rangelands of northwestern North Dakota. The owls relied heavily on wetland-dependent prey species (overall, 57 percent by number and 76 percent biomass) especially ducks (Anserinae) and rails (Rallidae). Far more avian (65 percent by number and 84 percent biomass) and less mammalian prey were used than typically reported. Variation in diet composition among owl families was not explained well by nesting area habitat, and was dominated by prey from wetlands regardless of wetland habitat availability. Diets of Great Horned Owls (Bubo virginianus) (Murphy 1993, Sargeant et al. 1993). The are better documented than those of most increase in this generalist predator may have other North American strigiforms. The owl implications for population dynamics of species preys mainly on small to mid-size mammals on which it preys. My objectives were to quan- especially small rodents and leporids tify diet composition of breeding Great Horned (Errington et al. 1940; Korschgen and Stuart Owls in an area of mixed farm- and rangeland 1972; McInvaille and Keith 1974; Marti and in the northern Great Plains, to assess varia- Kochert 1995, 1996; Voous 1988) although its tion in prey use among owl pairs, and to test list of prey includes diverse sizes and taxa (see whether such variation is explained by habitat Bent 1938).
    [Show full text]
  • Stomach Content Analysis of Recent Snowy Owl (Bubo Scandiacus) Specimens from Nebraska Rachel L
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Nebraska Bird Review Nebraska Ornithologists' Union 9-2014 Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska Rachel L. Valenziano University of Nebraska State Museum, [email protected] Thomas E. Labedz University of Nebraska State Museum, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/nebbirdrev Part of the Ornithology Commons, Poultry or Avian Science Commons, and the Zoology Commons Valenziano, Rachel L. and Labedz, Thomas E., "Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska" (2014). Nebraska Bird Review. 1353. http://digitalcommons.unl.edu/nebbirdrev/1353 This Article is brought to you for free and open access by the Nebraska Ornithologists' Union at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Nebraska Bird Review by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Valenziano and Labedz, "Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska," from Nebraska Bird Review (September 2014) 82(3). Copyright 2014 Nebraska Ornithologists’ Union. Used by permission. 122 The Nebraska Bird Review Vol. 82 No. 3 Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska Rachel L. Valenziano1 and Thomas E. Labedz2 University of Nebraska State Museum, Division of Zoology W-436 Nebraska Hall, University of Nebraska-Lincoln Lincoln, Nebraska 68588-0514 1rvalenziano [email protected] 2tlabedz [email protected] (corresponding author) Introduction The Snowy Owl (Bubo scandiacus) is a circumpolar bird of prey that breeds in extreme northern latitudes, including Canadian and Alaskan tundra.
    [Show full text]
  • Interspecific Intolerance of the American Coot in Utah
    [- Auk 424 LVoL76 INTERSPECIFIC INTOLERANCE OF THE AMERICAN COOT IN UTAH BY RONALD A. RYDER INTRODUCTION The American Coot (Fulica americana)is extremely territorial and vigorouslydefends its territoryagainst not only other cootsbut also a wide variety of vertebrates.The effectsof this interspecific intoleranceupon waterfowlproduction were investigated,with par- ticular emphasisupon comparativebehavior, nesting and young- rearingsuccess of cootsand ducks. The followingobservations con- cern primarily the first aspect. Nesting and young-rearingsuccess will be discussedin a later paper. This studywas financedthrough the Utah CooperativeWildlife Research Unit, with the U.S. Fish and Wildlife Service, Utah Fish and Game Department, Utah State University, and the Wildlife ManagementInstitute cooperating.Dr. JessopB. Low assistedin the direction and supervisionof the project. Observations were made at various marshes in northern Utah but primarily on Ogden Bay Refuge,one of six waterfowlmanagement areasdeveloped by the Utah Fish and GameDepartment. A detailed descriptionand history of this important waterfowl area has been publishedby Nelson (1954). Most findingsrelate to five studyareas, varyingin sizefrom 15 to 76 acres,three on OgdenBay Refugeand two on the Bay View Club, two miles west of Westpoint in Davis TABLE 1 GENERAL DESCRIPTION OF STUDY AREAS, WEBER AND DAVIS COUNTIF.•, UTAH PercentagesX Total Open Emer- Study Area AcreageX Water gents Upland Treatment Applied Unit 3 76.4 45 49 6 Control, no treatment Check Station N. Pond 17.• 21 48 •1 Control, no treatment S. Pond 14.8 16 46 •8 Coots reduced by shooting and trapping Westpoint N. Pond 48.0 38 1• 49 Cootsincreased by introduc- tion S. Pond 44.5 28 28 44 Coot hatch delayed by nest destruction x Basedon planimeteringcover maps prepared from aerial photosand ground inspection.
    [Show full text]
  • Sacramento River Trail Bird Checklist
    The Casual Birders Checklist of Birds on Sacramento River Trail SPECIES FREQUENCY SPECIES FREQUENCY LOONS Glaucous-winged Gull R Pacific Loon R Herring Gull U Common Loon R Forster's Tern R GREBES PIGEONS & DOVES Pied-billed Grebe R Rock Dove C CORMORANTS Band-tailed Pigeon R Double-crested Cormorant C Mourning Dove U DUCKS & GEESE OWLS Ruddy Duck R Western Screech-Owl R Canada Goose A Great Horned Owl R Wood Duck R HUMMINGBIRDS American Wigeon R Anna's Hummingbird U Gadwall R Rufous Hummingbird R Mallard C KINGFISHERS Ring-necked Duck R Belted Kingfisher U Lesser Scaup R WOODPECKERS Common Goldeneye U Acorn Woodpecker U Barrow's Goldeneye R Red-breasted Sapsucker R Bufflehead U Nuttall's Woodpecker U Hooded Merganser R Downy Woodpecker U Common Merganser A Northern Flicker C HERONS & EGRETS TYRANT FLYCATCHERS Great Blue Heron U Western Kingbird R Snowy Egret R Western Wood-Pewee R Great Egret U Willow Flycatcher R Snowy Egret R Pacific-slope Flycatcher R Green Heron U Black Phoebe C VULTURES Ash-throated Flycatcher R Turkey Vulture A VIREOS OSPREY Warbling Vireo R Osprey U Cassin's Verio R HAWKS & EAGLES CROWS & JAYS Sharp-shinned Hawk R Western Scrub-Jay A Cooper's Hawk R Yellow-billed Magpie R Red-shouldered Hawk U American Crow A Red-tailed Hawk R Common Raven R Bald Eagle R WAXWINGS FALCONS Cedar Waxwing R American Kestrel R THRUSHES Peregrine Falcon R Western Bluebird R PHEASANTS & TURKEYS Hermit Thrush U Wild Turkey R American Robin C WOOD-PARTRIDGES MOCKINGBIRDS & THRASHERS California Quail C Northern Mockingbird R COOTS California
    [Show full text]
  • Texas Wildlife Identification Guide
    TEXAS WILDLIFE IDENTIFICATION GUIDE A guide to game animals, game birds, furbearers and other wildlife of Texas. INTRODUCTION Texas game animals, game birds, furbearers and other wildlife are important for many reasons. They provide countless hours of viewing and recreational opportunities. They benefit the Texas economy through hunting and “nature tourism” such as birdwatching. Commercial businesses that provide birdseed, dry corn and native landscaping may be devoted solely to attracting many of the animals found in this book. Local hunting and trapping economies, guiding operations and hunting leases have prospered because of the abun- dance of these animals in Texas. The Texas Parks and Wildlife Department benefits because of hunting license sales, but it uses these funds to research, manage and protect all wildlife populations – not just game animals. Game animals provide humans with cultural, social, aesthetic and spiritual pleasures found in wildlife art, taxidermy and historical artifacts. Conservation organiza- tions dedicated to individual species such as quail, turkey and deer, have funded thousands of wildlife projects throughout North America, demonstrating the mystique game animals have on people. Animals referenced in this pocket guide exist because their habitat exists in Texas. Habitat is food, cover, water and space, all suitably arranged. They are part of a vast food chain or web that includes thousands more species of wildlife such as the insects, non-game animals, fish and i rare/endangered species. Active management of wild landscapes is the primary means to continue having abundant populations of wildlife in Texas. Preservation of rare and endangered habitat is one way of saving some species of wildlife such as the migratory whooping crane that makes Texas its home in the winter.
    [Show full text]
  • Geese, Ducks and Coots John L
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln U.S. Department of Agriculture: Animal and Plant Wildlife Damage Management Technical Series Health Inspection Service 8-2016 Geese, Ducks and Coots John L. Cummings National Wildlife Research Center, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/nwrcwdmts Part of the Behavior and Ethology Commons, Biodiversity Commons, Other Animal Sciences Commons, Other Ecology and Evolutionary Biology Commons, Population Biology Commons, and the Terrestrial and Aquatic Ecology Commons Cummings, John L., "Geese, Ducks and Coots" (2016). Wildlife Damage Management Technical Series. 4. http://digitalcommons.unl.edu/nwrcwdmts/4 This Article is brought to you for free and open access by the U.S. Department of Agriculture: Animal and Plant Health Inspection Service at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Wildlife Damage Management Technical Series by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. U.S. Department of Agriculture Animal & Plant Health Inspection Service Wildlife Services August 2016 Geese, Ducks and Wildlife Damage Management Technical Series Coots John Cummings Certified Wildlife Biologist/Retired Research Wildlife Biologist USDA-APHIS-Wildlife Services National Wildlife Research Center Fort Collins, Colorado Figure 1. Canada geese (Branta candensis). Human-Wildlife Conflicts Quick Links Landscapes from consumption of crops. Other impacts involve unacceptable accumulations of Human-Wildlife Conflicts 1 Canada geese, snow geese, ducks, and feces in pastures, trampling of emerging Damage Identification 3 American coots all have been implicated in crops, and increased erosion and runoff Management Methods 3 agricultural crop and turf damage.
    [Show full text]
  • The Great Horned Owl and Its Prey in North-Central United States Paul L
    Volume 24 Number 277 The great horned owl and its prey in Article 1 north-central United States September 1940 The great horned owl and its prey in north-central United States Paul L. Errington Iowa State College Frances Hamerstrom Iowa State College F. N. Hamerstrom Jr. Iowa State College Follow this and additional works at: http://lib.dr.iastate.edu/researchbulletin Part of the Agriculture Commons, and the Zoology Commons Recommended Citation Errington, Paul L.; Hamerstrom, Frances; and Hamerstrom, F. N. Jr. (1940) "The great horned owl and its prey in north-central United States," Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 24 : No. 277 , Article 1. Available at: http://lib.dr.iastate.edu/researchbulletin/vol24/iss277/1 This Article is brought to you for free and open access by the Iowa Agricultural and Home Economics Experiment Station Publications at Iowa State University Digital Repository. It has been accepted for inclusion in Research Bulletin (Iowa Agriculture and Home Economics Experiment Station) by an authorized editor of Iowa State University Digital Repository. For more information, please contact [email protected]. September, 1940 Research Bulletin 277 The Great Horned Owl and Its Prey in North.. Central United States By PAUL L. ERRINGTON, FRANCES HAMERSTROM AND F. N . HAMERSTROM, JR. AGRICULTURAL EXPERIMENT STATION IOWA STATE COLLEGE OF AGRICULTURE AND MECHANIC ARTS ENTOMOLOGY AND ECONOMIC ZOOLOGY SECTION UNITED STATES BIOLOGICAL SURVEY AMERICAN WILDLIFE INSTITUTE IOWA CONSERVATION COMMISSION Cooperating AMES, IOWA CONTENTS Page Foreword 759 Summal'Y 760 Introduction 763 Feeding trends of the gTeat horned owl in the north-central region 768 Gcneral comparison of data for cold and warm weather seasons 7'70 'Winter to summer transitions in diet as illustrated by data froIP.
    [Show full text]
  • Winter Field Card
    CONNECTICUT BIRD ATLAS – WINTER FIELD CARD Use this form to report species detected during timed one-hour block surveys. IMPORTANT: Report only species found within the block boundaries. Use a separate card for each site/visit. Observer(s): ______________________________________________________________________________ __________________________________________________ Email: _________________________________ Block: ______ Site name: _____________________ Coordinates: __________________________________ Date: ________________________ Start time: __________________ End time: _______________________ Circle to confirm whether all species detected are marked below: YES NO For other data forms and details on data entry, go to: www.ctbirdatlas.org Please report all of the time spent on the project and your mileage on the Volunteer Form Species Count Species Count Snow Goose Red-necked Grebe Brant Rock Pigeon Canada Goose Mourning Dove Mute Swan Virginia Rail Wood Duck American Coot Northern Shoveler Black-bellied Plover Gadwall Killdeer American Wigeon Ruddy Turnstone Mallard Sanderling American Black Duck Dunlin Northern Pintail Purple Sandpiper Green-winged Teal American Woodcock Canvasback Wilson's Snipe Redhead Greater Yellowlegs Ring-necked Duck Bonaparte's Gull Greater Scaup Laughing Gull Lesser Scaup Ring-billed Gull scaup sp. Herring Gull Common Eider Iceland Gull* Surf Scoter Lesser Black-backed Gull* White-winged Scoter Great Black-backed Gull Black Scoter Red-throated Loon Long-tailed Duck Common Loon Bufflehead Northern Gannet Common
    [Show full text]
  • Ecology and Management of the American Coot Fulica Americana Americana Gmelin Clarence Andrew Sooter Iowa State College
    Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1941 Ecology and management of the American coot Fulica americana americana Gmelin Clarence Andrew Sooter Iowa State College Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Ecology and Evolutionary Biology Commons, and the Environmental Sciences Commons Recommended Citation Sooter, Clarence Andrew, "Ecology and management of the American coot Fulica americana americana Gmelin " (1941). Retrospective Theses and Dissertations. 13580. https://lib.dr.iastate.edu/rtd/13580 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand corner and continuing from left to right in equal sections with small overiaps.
    [Show full text]