Check this site out
http://www.dcnr.state.pa.us/forestry/deersurvey.aspx
Aerial Survey Effort to Gauge Deer Populations in State Forests
In an effort to obtain accurate statistics on white-tailed deer populations, an infrared camera-equipped plane has begun flying over 250,000 acres of state forestland.
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hmm..., Interesting. I wonder if State Wildlife officials ever see anything large on the FLIR,.... like say 8 ft. tall and 500 lbs.
ohio_squatcher