If you do not know the name of a bird you saw
check the Color Guide which is sorted according to plumage and linked to coverage of individual species
If you are having trouble interpreting the bird's behavior
check the Essays Sorted by Topic for links to about 200 essays. If you click on a topic listed below, that topic will be visible in window.
If you are having trouble interpreting the icons or abbreviations
check the Abbreviations Guide if you find words in the species treatments indecipherable or the organization unclear
If you would like complete references
check the Bibliography