How many active hunters (of deer, bear, duck, etc.) are there in the U.S.?

Hi! Thanks for the question.

Here are the numbers according to the US Fish and Wildlife Service.
Please take note that the last and latest survey was made in 2001 and
is done every five years and the 2006 survey is underway.

"13 million people 16 years and older enjoyed hunting in the U.S.
Those 13 million hunters spent 228 days afield, took 200 million
hunting trips and spent $20.6 billion pursuing their passion."

The breakdown on hunting types are the following: (people maybe a
combination of different types of hunters)

big game - 11.0 million
small game - 5.4 million
migratory birds - 3.0 million
other animals - 1.0 million 

Source: 
US Fish and Wildlife Service
http://www.fws.gov/hunting/huntstat.html


Search terms used:
hunting statistics
 
I hope this would help you in your research. Before rating this
answer, please ask for a clarification if you have a question or if
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Regards,                              
Easterangel-ga                              
Google Answers Researcher

"Those 13 million hunters spent 228 days afield ..."

Does that suggest that each of them was out hunting 2 out of 3 days each year?!
OR, is that a sum of the days of the various legal hunting seasons
throughout the country?

??

I think that the estimates were cumulative in nature.