Tweets:

I tried to save the posting concerning ability of European Kestrels to see
in the UV range (enabling them to track rodents by their urine and feces)
but something went awry. I think it was a Tweeters posting. It would be much
appreciated if someone can post again or forward to me.

Chris Maack
btlc at name1.ak.net
3522 Alexander Ave.
Anchorage, AK 99508