Of all the collections of bald eagle sounds, the Hancock Wildlife Organization has a well-organized set of recordings of eagle voices, all of which were recorded of a particular nesting pair over a period of time. Ordinary activities, such as trading places between the male and female and feeding the eaglets, are characterized with high-pitched peeping and chirping, sometimes approaching chattering, not unlike other birds.
Sounds intended to warn a single nearby woodpecker and more sounds warning of the approach of a flock of Canada geese are clearly different from the domestic warbling of the nest. When intruders appear, the extended, rising pitch of the eagle's cry carries a clear message of alarm as well as warning.
While not normally expected to take place during night time hours, a territorial dispute may arise between eagles or between nesting eagle couples. These conflicts would be marked with sounds that might be called screeching or squawking, a series of calls of descending pitch and increasing volume.
Since bald eagles are not generally considered nocturnal, their night time sounds are limited unless they are disturbed. In many locations, however, they are actively feeding at dusk and dawn and could be observed at those times sitting silently overlooking lakes and rivers.
