scholarly journals New avian breeding records for Kugluktuk, Nunavut

2019 ◽  
Vol 132 (3) ◽  
pp. 254-260
Author(s):  
Myles M. Lamont
Keyword(s):  
Bald Eagle ◽  
Haliaeetus Leucocephalus ◽  
Barn Swallow ◽  
Zonotrichia Albicollis ◽  
Geographic Coverage ◽  
Perisoreus Canadensis ◽  
Anas Clypeata ◽  
Aythya Marila ◽  
Breeding Seasons ◽  
Survey Effort

New breeding records for 10 species of tundra and boreal nesting birds were documented near the community of Kugluktuk (Nunavut, Canada) over the course of the 2015 and 2016 breeding seasons and incidentally in 2017 and 2018. These species include American Wigeon (Mareca americana), Mallard (Anas platyrhynchos), Northern Shoveler (Anas clypeata), Green-winged Teal (Anas carolinensis), Greater Scaup (Aythya marila), Say’s Phoebe (Sayornis saya), Canada Jay (Perisoreus canadensis), Greycheeked Thrush (Catharus minimus), Yellow-rumped Warbler (Setophaga coronata), and Dark-eyed Junco (Junco hyemalis). Previously unpublished breeding evidence for Bald Eagle (Haliaeetus leucocephalus) is also discussed along with suspected breeding of Barn Swallow (Hirundo rustica), Bohemian Waxwing (Bombycilla garrulus), White-throated Sparrow (Zonotrichia albicollis), and Pine Grosbeak (Pinicola enucleator). These records represent the first described breeding occurrences for these species in the Kitikmeot region, or new records for the mainland of Nunavut. A lack of historical ornithological survey effort in this area has likely led to the diversity of these previously unrecorded breeding observations. These results highlight the need to increase geographic coverage of bird surveys in northern Canada to more accurately delineate the northern limit of breeding ranges and suggest that further formal survey effort will undoubtedly lead to additional new breeding records.

Bilateral Malignant Seminoma With Ventricular Metastasis in a Bald Eagle (Haliaeetus leucocephalus)

2018 ◽  
Vol 32 (3) ◽  
pp. 240-245
Author(s):  
Patrick J. Sullivan ◽  
Olufemi O. Fasina ◽  
Andrew C. Cushing. BVSc
Keyword(s):  
Bald Eagle ◽  
Haliaeetus Leucocephalus

Bald Eagle Lead Exposure in the Upper Midwest

2014 ◽  
Vol 5 (2) ◽  
pp. 208-216 ◽  
Author(s):  
Sarah E. Warner ◽  
Edward E. Britton ◽  
Drew N. Becker ◽  
Michael J. Coffey
Keyword(s):  
Lead Poisoning ◽  
Lead Exposure ◽  
Clinical Signs ◽  
Local Environment ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus ◽  
Upper Midwest ◽  
Bald Eagles ◽  
Potential Source ◽  
Liver Lead Concentration

Abstract In 2012, we examined lead exposure in 58 bald eagles Haliaeetus leucocephalus found dead in Iowa, Minnesota, and Wisconsin. We determined lead concentrations in livers, examined differences in exposure among ages and between sexes, and recorded clinical signs consistent with lead poisoning. Most (60%) of the bald eagles had detectable lead concentrations, and 38% of the 58 had concentrations within the lethal range for lead poisoning. We found no differences in exposure based on sex or age, but we did find an inverse relationship between body and liver mass and liver lead concentration. The high percentage of lead-exposed bald eagles encouraged us to further examine potential sources of lead in our local environment. We initiated a study on the Fish and Wildlife Service's Upper Mississippi River National Wildlife and Fish Refuge to investigate if discarded offal piles from hunter-killed deer were a potential source of lead exposure to scavenging wildlife such as the bald eagle. Radiographs showed that 36% of offal piles in our sample area contained lead fragments ranging from 1 to 107 particles per pile. Our study indicated that 1) lead exposure rates for bald eagles found dead in our Upper Midwest study area were high, 2) more than one-third of the bald eagles found dead in Iowa, Minnesota, and Wisconsin had liver lead concentrations consistent with lead poisoning, and 3) discarded offal piles from deer shot with lead ammunition can be a potential source of lead exposure for bald eagles.

Central Nervous System B-cell Lymphoma in a Bald Eagle (Haliaeetus leucocephalus)

2018 ◽  
Vol 32 (1) ◽  
pp. 40-44
Author(s):  
Marike Visser ◽  
Heather Walz ◽  
Stephanie Shrader ◽  
Jey Koehler ◽  
Jamie Bellah
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
B Cell ◽  
Cell Lymphoma ◽  
B Cell Lymphoma ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus

scholarly journals Isolation of mixed subtypes of influenza A virus from a bald eagle (Haliaeetus leucocephalus)

2010 ◽  
Vol 7 (1) ◽  
Author(s):  
Sagar M Goyal ◽  
Naresh Jindal ◽  
Yogesh Chander ◽  
Muthanan A Ramakrishnan ◽  
Patrick T Redig ◽  
...  
Keyword(s):  
Influenza A Virus ◽  
Influenza A ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus

scholarly journals Nanomechanical properties of bird feather rachises: exploring naturally occurring fibre reinforced laminar composites

2014 ◽  
Vol 11 (101) ◽  
pp. 20140961 ◽  
Author(s):  
Christian M. Laurent ◽  
Colin Palmer ◽  
Richard P. Boardman ◽  
Gareth Dyke ◽  
Richard B. Cook
Keyword(s):  
Fibrous Composite ◽  
Bald Eagle ◽  
Mechanical Anisotropy ◽  
Haliaeetus Leucocephalus ◽  
Materials Testing ◽  
Fibrous Composite Material ◽  
Nano Indentation ◽  
Selective Pressures ◽  
Cygnus Olor ◽  
Naturally Occurring

Flight feathers have evolved under selective pressures to be sufficiently light and strong enough to cope with the stresses of flight. The feather shaft (rachis) must resist these stresses and is fundamental to this mode of locomotion. Relatively little work has been done on rachis morphology, especially from a mechanical perspective and never at the nanoscale. Nano-indentation is a cornerstone technique in materials testing. Here we use this technique to make use of differentially oriented fibres and their resulting mechanical anisotropy. The rachis is established as a multi-layered fibrous composite material with varying laminar properties in three feathers of birds with markedly different flight styles; the Mute Swan ( Cygnus olor ), the Bald Eagle ( Haliaeetus leucocephalus ) and the partridge ( Perdix perdix ) . These birds were chosen not just because they are from different clades and have different flight styles, but because they have feathers large enough to gain meaningful results from nano-indentation. Results from our initial datasets indicate that the proportions and orientation of the laminae are not fixed and may vary either in order to cope with the stresses of flight particular to the bird or with phylogenetic lineage.

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