This is a good chance to plug the the Breeding Bird Atlas of Maryland and 
D.C. which has a wealth of information about each species including such 
info as number of broods, early/late egg dates, etc. This information is 
still good although the Atlas was done so long ago. 

Cheers,
Kathy

Kathy Klimkiewicz, Biologist
USGS Patuxent WRC BBL
12100 Beech Forest RD STE 4037
Laurel MD 20708-4037
301-497-5795 work
Fax 301-497-5717

Report bands: reportband.gov and get instant feedback!
http://www.pwrc.usgs.gov/bbl