scholarly journals The Bald Eagle of North America

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

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

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
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