Organizations

Audubon New York
Audubon Society of the Capital Region
Cornell Laboratory of Ornithology
Columbia County Tourism UPDATED 1/9/15
    (order your Columbia Coutny Bird Guide)
Columbia Land Conservancy
Harlem Valley Rail Trail
Hudson-Mohawk Bird Club
Hudson River Valley Greenway
John Burroughs Association
National Audubon Society
National Wildlife Federation
The Nature Conservancy
The New York State Bluebird Society
New York State Department of
      Environmental Conservation
New York State Ornithological Association
New York State Young Birders Club
Ralph T. Waterman Bird Club
     (Dutchess County)
Scenic Hudson

Projects and Data

eBird - Cornell Lab or Ornithology - explore bird sightings data & enter your own NEW 1/9/15
BirdCount - Bird counts and count data (Cornell / National Audubon / Bird Studies Canada)
Breeding Bird Atlas - Home Page (NYSDEC)
Hudson River Almanac (NYSDEC)
NYSOA Waterfowl Count
Migratory Bird Research - Patuxent Bird Population Studies
New York State Avian Records Committee (NYSOA/NYSARC)
North American Breeding Bird Survey
Project Feederwatch (Cornell Laboratory of Ornithology)

Reference

AOU Checklist
Bent Life Histories (Birdzilla.com) CHANGED 1/9/15 - Click in the Search our bird guide box, click a species, and then click the Bent Life History above the image of the bird when it appears.
Birding on the Net (Siler--previously Birding on the Web)