I can't seak of Red-tails but in reference to breeding-like activity; I was 
surprised to hear Chickadees singing last week durring the snow storm. Since 
then Titmice have been singing daily at my house and Robins have begun thier 
vireo-like song as well.  Sounds like March around my house!

Good Birding,
Chris Starling
North East. MD

"From: Jim Meyers <>
In past years we've
>seen Red-tails begin to build (or rebuild) nests as early as the 2nd or 3rd 
>week of
>February, but this is the earliest we've ever seen any activity of 
>Red-tails at nest sites. Has
>anyone seen this behavior of Red-tails this early in MD? We observed this 
>at Cromwell Valley
>Park( Parkville) at 4:00pm.         Jim Meyers"

_________________________________________________________________
Is your PC infected? Get a FREE online computer virus scan from McAfeeŽ 
Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963