Thread: Kestrels
View Single Post

  #26 (permalink)  
Old 07-11-2009, 11:40 AM
willing to learn willing to learn is offline
Commander of the Wild Empire
 
Join Date: Dec 2007
Location: Derbyshire
Posts: 1,122
Re: Kestrels

Quote:
Originally Posted by evilgrayson View Post
Given the reported miss rates of a two-eyed bird, if a one-eyed raptor takes fewer chances (as I did, I never crossed a road if I wasn't absolutely sure about the cars on it) and doesn't go for the targets it considers marginal, it's not wasting the same amount of energy and thus may survive because while it isn't catching as much, it hasn't worn itself out trying.
I think these miss rates with "experienced" raptors has been some what false. A lot depends if a raptor is prospecting for an easy meal, not really driven with urgency to feed young or hunger its self. On some of the figures quoted it would be impossible for a raptor to maintain its body condition and energy levels or blood sugars, never mind having to catch enough to keep a brooding female going with young chicks. An "experienced" raptor prospecting for a easy meal and taking a half hearted attempt, is not to be mistaken with one that needs.
Regards
Colin
__________________
Don't just talk the talk :) walk the Walk.
Reply With Quote