Experts say migratory birds move from one geographic location to another, usually from a breeding area to a nonbreeding
area, before the onset of winter to avoid the impact of harsh weather conditions.
Below the description are paintings of the auklet as a juvenile, a nonbreeding
adult, and a breeding adult, when both sexes grow wispy, white plumes above their eyes and across their cheeks, and a stubby horn sprouts from their bill.
Home range size has not been documented for Bald Eagles from Louisiana and it is also unknown where this population spends the summer nonbreeding
season, as they are rarely observed in state during June, July, and August (Lowery, 1974).
The preliminary study on bird diversity during nonbreeding
period of Poyang Lake region in Gongqingcheng City.
For example, studying populations of social animals for multiple years has been highly useful in determining what factors influence the decision of a bird to become a nonbreeding
helper at the nest rather than a breeding adult (e.
Among the 16 penguin species that lay two eggs, only the Eudyptes species evolved what's called a pelagic life, spending their nonbreeding
season mostly at sea and migrating, in some cases considerable distances, to breeding sites.
The elevated percentage of nonbreeding
species to total species is an indication that birds find the site attractive as a migratory stopover location and, for birds that nest near the site, as foraging grounds.
Effects of neckbands on survival and fidelity of white-fronted and Canada geese captured as nonbreeding
Potential threats of commercial fishing, offshore wind, and climate change have prompted the need for information on the nonbreeding
movements and wintering locations of seabirds that nest in the Gulf of Maine," explains Stephen Kress, director of the Audubon Seabird Restoration Program.
High rates of nonbreeding
adult Bald Eagles in Southeastern Alaska.
Only 1 bird showed very large follicles; however, this would not be unusual in the nonbreeding
Enhanced testosterone secretion in adult rams after establishment of a high-frequency, low-amplitude pattern of LH pulses in the nonbreeding
season occurs without changes in the number or binding affinity of testicular LH receptors.