Acanthocephala of the Bald Eagle (Haliaeetus leucocephalus) in North America

1997 ◽  
Vol 83 (3) ◽  
pp. 540 ◽  
Author(s):  
Dennis J. Richardson ◽  
Rebecca A. Cole
Keyword(s):  
North America ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus

Foraging behaviour of four avian species feeding on the same temporarily available prey

2020 ◽  
Vol 98 (9) ◽  
pp. 581-590 ◽  
Author(s):  
N.S.B. Houpt ◽  
A.P.H. Bose ◽  
T. Warriner ◽  
N.A.W. Brown ◽  
J.S. Quinn ◽  
...  
Keyword(s):  
North America ◽  
Census Data ◽  
Prey Availability ◽  
Bird Species ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus ◽  
Western North America ◽  
Bald Eagles ◽  
Tidal Cycles ◽  
Plainfin Midshipman

Low tide events provide terrestrial predators with ephemeral, but predictable and abundant sources of prey. Understanding the relationships between tidal cycles, prey availability, and predator abundances is vital to characterizing the ecological relationship between terrestrial predators and their marine prey. Here, we describe the foraging tactics of four common bird species in western North America — Bald Eagles (Haliaeetus leucocephalus (Linnaeus, 1766)), Great Blue Herons (Ardea herodias Linnaeus, 1758), Glaucous-winged Gulls (Larus glaucescens J.F. Naumann, 1840), and Northwestern Crows (Corvus caurinus S.F. Baird, 1858) — feeding on the same transiently accessible fish species, the plainfin midshipman (Porichthys notatus Girard, 1854). We conducted avian predator surveys at breeding beaches of plainfin midshipman across multiple years and sites. Our census data showed that Bald Eagle and Great Blue Heron abundances were higher when the tides were receding than incoming at Ladysmith Harbour, British Columbia, Canada, but the opposite trend was found for total predator abundance at a second site in Dabob Bay, Washington, USA. Glaucous-winged Gull abundance decreased over the course of the plainfin midshipman breeding season (April–July), whereas the abundances of the other three species remained stable. Our data suggest that the foraging activities of birds in the intertidal zones of western North America are linked with the tidal cycles, corresponding to periods of high prey vulnerability.

PARASITES OF THE BALD EAGLE (HALIAEETUS LEUCOCEPHALUS) OF NORTH AMERICA

1982 ◽  
Vol 18 (4) ◽  
pp. 501-506 ◽  
Author(s):  
BENJAMIN N. TUGGLE ◽  
SHEILA K. SCHMELING
Keyword(s):  
North America ◽  
Bald Eagle ◽  
Haliaeetus Leucocephalus

scholarly journals The Bald Eagle of North America

Nature ◽  
1956 ◽  
Vol 178 (4547) ◽  
pp. 1387-1387
Keyword(s):  
North America ◽  
Bald Eagle

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
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