Tables. — Food remains collected at nests 

 of iald eagles on the Aleutian Islands, 

 1936 and 1937 



Food item 



fishes: 

 Dolly Varden trout {Salvelinus 

 malma) 



Handsavvflsh (Alepisaurus sp.)- 

 YoWack (.TheTagrachalcograjnma). 

 Pacific cod {Gadiis macTocephalus) 



Rockfish {Sebastodes sp.) -. 



Greenling {Hexagrammos sp.).... 

 Atka mackerel {Pleurogrammus 



monopterygius) 



Sculpins (Cottidae) 



Unidentified fish.. 



Occurrence 



Number Percent 



Total - 



birds: 



Shearwater (Puffinus sp.) 



Fulmar (Fulmarus glacialis) 



Forked-tailed petrel (Oceano- 



dro ma furcata) — 



Cormorant (Phalacrocorax sp.)-- 

 Emperor goose (Philaclecanagka). 



PintaU {.Anas acuta) -- 



Teal (probably Anas crecca) 



Old-squaw (Clangula hyemalis).. 

 Harlequin duck {Hisfrionicus 



hisfrionicus) 



Unidentified duck 



Common eider {Somateria mol- 



lisima) 



Red-breasted merganser (Mergus 



senator) 



Bald eagle nestling (Haliaeetus 



leucocephalus) 



Rock ptarmigan {Lagopus miUus). 

 Glaucous gull {Larus hyper- 



boreus) 



Glaucous-winged gull {Larus 



glaucescens) 



Kittiwake (Rissa Iridactyla) 



Murres {Uria aalge, U. lonivia).. 

 Pigeon guilleniot {Cepphus 



columba) __- 



Ancient murrelet {Synthliboram- 



phus antiquum) - 



Paroquet auklet {Cyclorrhynchus 



psittacula) -- 



Crested auklet (.'iethia crista- 



fella) -- -- 



Least auklet (Aethia pusilla) 



Horned puffin (Fratercula cor- 



ntculata) 



Tufted puffin (Lunda cirrhata).. 



Unidentified alcid 



Raven (Corvus corax) 



Unidentified bird 



Total. 



mammals: 



Domestic sheep 



Blue fox (Alopex sp.) 



Aleutian grotmd squirrel {Citel- 

 lus p. albusus), -- 



Field mouse (Microttis amakensis) 

 House rat (Patlus norvegicus) — 

 Sea lion (Eumetopias jubata) 



Total. 



invertebrates: 



Squid (Chondrophora). 



Snail (Gastropoda) 



Crab (OxjThyncha) 



Clam worm (Nereidae). 



Total 



Grand total. 



360 



0.2 

 .9 



2.0 

 2 

 .2 

 .9 



3.1 

 1.6 

 .7 



9.8 



4.7 

 18.3 



.2 



5.4 



.4 



2.2 



.7 



.7 



1.6 



.2 



. 2 

 _ 2 



.4 



6.9 



7^6 



1.3 



2.2 



2.2 



9.2 

 3.6 



2.9 



6.1 



1.1 



.4 



.9 



80.7 



the total number of food items 

 collected. 



In appraising this type of mate- 

 rial, which contains food pellets as 

 well as nest debris, attention should 

 be called to the fact that, when 

 eagles are feeding exclusively on 

 fish, compact pellets are seldom 

 formed. On the other hand, when 

 mammals are eaten and, to a less 

 extent, birds, pellets usually are 

 formed. It is possible, therefore, 

 that the, recorded amount of fish 

 eaten by these Aleutian eagles may 

 have been minimized somewhat in 

 the tabulation. 



UNITED STATES 



In marked contrast with the 

 stomach material from Alaska, 

 gathered in recent years and in con- 

 siderable volume, that available 

 from the United States was col- 

 lected largely in earlier years 

 (more than half of it in the past 

 century), and the 31 stomachs so 

 assembled were from 18 different 

 States. Furthermore, earlier ex- 

 aminations, while adequate with re- 

 spect to the identity of the items, 

 were not conducted in conformity 

 with modem volumetric methods, 

 and thus prevented their combining 

 with more-nearly current examina- 

 tions. For these reasons, a tabular 

 presentation of the data from bald- 

 eagle stomachs taken in the United 

 States is impractical. Further in- 

 sight into the food preferences of 

 bald eagles in the mid-Atlantic 

 States is obtainable, however, from 

 the analyses of pellets and food 

 debris found at nests and roosts. 

 In table 4, food items found at the 

 nests of bald eagles in coastal areas 



24 



