Below are links to the best sources of data with a description of what can be done with the data.
- eBird – This is the premier data entry and retrieval network sponsored by the Cornell lab of Ornithology and the National Audubon Society. You can enter your own data, manage your own data lists, and access data in a variety of formats (lists, graphs, Excel spreadsheet).
- MD/DC Breeding Bird Atlas Project 2002 – 2006 – This includes data collected by 10 square mile blocks throughout Maryland from 2002 – 2006. Every species that was breeding was coded by evidence as a Confirmed, Probably, or Possible Breeder. Data can be accessed by species or by location and can be obtained for the specific geographic area needed (house, school location).
- MD/DC Breeding Bird Atlas Project 1983-1987 – This includes data collected by 10 square mile blocks throughout Maryland from 1983-87. It allows historical comparison with the 2002 – 2006 data.