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Old 06-03-2011, 12:47 PM  
_Richard_
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Quote:
Originally Posted by V_RocKs View Post
Oh snap!
haha happy hunting

Quote:
birds have an olfaction threshold range of 0.01 to 0.5 ppm, while the McKeegan study. (2002) report thresholds of 1 and 2.5 ppm for ammonia and hydrogen sulphide respectively in hens, Gallus domesticus.
Contrast these results to human detection threshold for ammonia ranges from 0.0005 to 0.37 ppm and much lower threshold for hydrogen sulphide at 1×10E-7 to 0.0002 ppm (McKeegan study. 2002).

Read more: http://wiki.answers.com/Q/Can_birds_smell#ixzz1OFByvpnC
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