Differences in Distribution of Breeding, Nonbreeding, and Migrant Bald Eagles on the Northern Chesapeake Bay. Buehler, D., A., Mersmann, T., J., Fraser, J., D., & Seegar, J., K., D. The Condor, 93(2):399-408, 1991. abstract bibtex We compared the distributions of resident breeding, resident nonbreeding, and northern and southern migrant Bald Eagles (Haliaeetus leucocephalus) on the northern Chesapeake Bay from 1984-1988. Breeding eagles were dispersed throughout most of the study area and were resident all year. Dispersion of Chesapeake nonbreeding eagles was similar to the dispersion of breeding birds on the northern Chesapeake in summer and winter. Chesapeake nonbreeding eagles moved throughout most of the bay, 55% of radio-tagged eagles were off the bay during any month. Radio-tagged northern migrants arrived in late fall (x = 21 December, n = 7, range = 61 days) and departed in early spring (x = 27 March, n = 14, range = 43 days). In contrast to local eagles, northern migrants were concentrated almost exclusively on Aberdeen Proving Ground, Maryland. Radio-tagged southern migrants arrived throughout April-August (x = 6 June, n = 11, range = 94 days) and departed from June-October (9 = 3 September, n = 22, range = 119 days). Southern migrants were more dispersed than the northern migrants but less dispersed than the resident eagles. Northern Chesapeake eagle abundance peaked twice annually; in winter (e.g., 261 eagles, December 1987), due to the presence of northern eagles, and in summer (e.g., 604 eagles, August 1988), due to the presence of southern birds.
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title = {Differences in Distribution of Breeding, Nonbreeding, and Migrant Bald Eagles on the Northern Chesapeake Bay},
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year = {1991},
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pages = {399-408},
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abstract = {We compared the distributions of resident breeding, resident nonbreeding, and northern and southern migrant Bald Eagles (Haliaeetus leucocephalus) on the northern Chesapeake Bay from 1984-1988. Breeding eagles were dispersed throughout most of the study area and were resident all year. Dispersion of Chesapeake nonbreeding eagles was similar to the dispersion of breeding birds on the northern Chesapeake in summer and winter. Chesapeake nonbreeding eagles moved throughout most of the bay, 55% of radio-tagged eagles were off the bay during any month. Radio-tagged northern migrants arrived in late fall (x = 21 December, n = 7, range = 61 days) and departed in early spring (x = 27 March, n = 14, range = 43 days). In contrast to local eagles, northern migrants were concentrated almost exclusively on Aberdeen Proving Ground, Maryland. Radio-tagged southern migrants arrived throughout April-August (x = 6 June, n = 11, range = 94 days) and departed from June-October (9 = 3 September, n = 22, range = 119 days). Southern migrants were more dispersed than the northern migrants but less dispersed than the resident eagles. Northern Chesapeake eagle abundance peaked twice annually; in winter (e.g., 261 eagles, December 1987), due to the presence of northern eagles, and in summer (e.g., 604 eagles, August 1988), due to the presence of southern birds.},
bibtype = {article},
author = {Buehler, David A. and Mersmann, Timothy J. and Fraser, James D. and Seegar, Janis K. D.},
journal = {The Condor},
number = {2}
}
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