Handbooks containing all the information on the Atlas you will need to successfully atlas. The Field Handbook is formatted for printing on the short edge (not the long edge).
This timeline illustrates the migration/dispersal period and the breeding period for each species. Use it to learn when species are nesting in Maryland and DC, and when their migration or dispersal overlaps with their nesting. During their migration/dispersal period, weak codes should not be used (e.g., code H, code S, or code M), while other Probable codes should be used with acute caution and always supplemented with comments.
Placard to place on windshield or dashboard while you are atlasing.