. The Canadian field-naturalist. 2000 Stocek: Diet of Wintering Bald Eagles 607. Figure L General distribution of wintering Bald Eagle feeding observations, 1992-1999, New Brunswick. Many locations represent a number of feeding sites. class was recorded were of adult eagles (Table 2). The importance of deer in the diet of both adults and immatures was evident. A notable difference in food utilization was the greater use of offal by immatures. In fact, 71% of the dietary items taken by the younger birds were scavenged deer and offal. Of 32 hunting attacks witnessed on coastal water birds, eight
. The Canadian field-naturalist. 2000 Stocek: Diet of Wintering Bald Eagles 607. Figure L General distribution of wintering Bald Eagle feeding observations, 1992-1999, New Brunswick. Many locations represent a number of feeding sites. class was recorded were of adult eagles (Table 2). The importance of deer in the diet of both adults and immatures was evident. A notable difference in food utilization was the greater use of offal by immatures. In fact, 71% of the dietary items taken by the younger birds were scavenged deer and offal. Of 32 hunting attacks witnessed on coastal water birds, eight involved immature eagles. There was a marked seasonal variation in some of the prey items consumed (Table 3). Scavenged deer constituted a substantial part of the diet in the colder months and early spring. Almost 60% of all feeding occurrences in February and March involved deer. Both birds and fish decreased in importance as the seasons progressed. Small mammals were more available to foraging eagles in the early spring. Offal consumption was most evident in late fall and winter. Less than one percent of the 949 feeding observa- tions in New Brunswick were reported as stealing (from gulls, cormorants, seals, and other eagles). This is likely an underestimate. Without seeing an Table 1. The occurrences (%) of food items utilized by wintering Bald Eagles in New Brunswick, 1992-1999, from direct feeding observations. Number of observations (% ) Food Item Coastal Inland Total Fish Bird Deer Other mammals Offal Invertebrate Total 11(4) 18(3) 29(3) 109 (41) 42(6) 151(16) 0(0) 413(61) 413 (43) 22(8) 51(7) 73(8) 126 (47) 156(23) 282 (30) 1(<1) 0(0) 1«1) 269 680 949(100). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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