Colonial Bird Surveys


 

Bird Surveys 300 x 256

Birds such as the American white pelican have been nesting on the refuge since before its establishment in 1936. Bird surveys of colonial island nesting birds (American white pelican, double-crested cormorant, great blue heron, ring-billed gull, California gull, and Caspian tern), colonial over water nesters (Franklin's gull, white-faced ibis, and black-crowned night heron), and other colonial nesters (common tern, Forster's tern, eared grebe) allow us to monitor changes in their populations.
Just because their numbers fluctuate from year to year doesn't capture the entire story of each of these bird species. These birds rely on many other places in North American, and throughout the year, for their life cycle needs. Bowdoin National Wildlife Refuge is one of these places. Bowdoin Refuge provides migration habitat and a place to breed, raise, and feed their young. Whereas other refuges and areas may also provide migration habitat, and more southern areas serve as wintering grounds.