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size determines gender

Last post 10-27-2009, 9:39 AM by Matt. 5 replies.
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  •  10-25-2009, 9:26 PM 121997

    size determines gender

    Attachment: RTHA pair.jpg
    All kinds of questions came to mind when I saw this.  Red-tails are loners, what are they doing together?  I assume female left, male right.  They migrate but do they migrate together? Just trying to understand what these birds were doing together as this is not the mating season.    


    Latest Birds: Black-throated Green Warbler, Pine Warbler, Eastern Kingbird, Rufous-backed Robin, Crissal Thrasher
  •  10-26-2009, 5:51 AM 122004 in reply to 121997

    Re: size determines gender

    Nice pic!  Were they together for a long time?  Maybe one just happened to land where the other was to say "hello" (or whatever birds do to greet each other)
    Life List: 139
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  •  10-26-2009, 7:25 PM 122100 in reply to 122004

    Re: size determines gender

    i think the bird on the right is a swainson's hawk, matt.
  •  10-26-2009, 7:48 PM 122138 in reply to 122100

    Re: size determines gender

    Attachment: hawk pair.jpg

    wow natureboy you scared me

    I went through my shots after the one I posted and have poor pictures of both birds in flight

    looks like they are both red-tailed  (?)

    Curlybird, they were sitting there as I pulled up and only left when I got out of the truck

    So am I back to gender?


     



    Latest Birds: Black-throated Green Warbler, Pine Warbler, Eastern Kingbird, Rufous-backed Robin, Crissal Thrasher
  •  10-27-2009, 12:58 AM 122230 in reply to 122138

    Re: size determines gender

    touche'.  i now see how wrong i was.
  •  10-27-2009, 9:39 AM 122259 in reply to 122230

    Re: size determines gender

    I posted on the ID thread and got confirmation that there is a gender difference.  My guidebook makes no reference to it.  BTW, another person made the same Swainson's ID as you did, means that you have a pretty good eye.  I did not want to ask this in the ID forum, but wouldn't two different raptors in that close a proximity be improbable?  That both of you made the observation says that it wouldn't be unheard of.  An issue like this is what separates someone just walking in the woods vs a birder. 

    Latest Birds: Black-throated Green Warbler, Pine Warbler, Eastern Kingbird, Rufous-backed Robin, Crissal Thrasher
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