I can't answer those questions but it would be interesting to know where these birds dropped their primaries and if they pause their migration while they grow them back or continue on..
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> On Jul 22, 2017, at 4:48 AM, Robert O'Brien <baro...> wrote:
> Hmm, a little puzzling. Why would a species engage in long distance migration in that condition. This would require some research in the ornithological literature I guess. And in escaping a peregrine, which could benefit from high maneuverability, these missing primaries would seem like a big disadvantage. I wonder if that's why they tried to dive or remain in the water instead of going into flight. Bob obrien
> On Friday, July 21, 2017, Roy Lowe <roy.loweiii...> wrote:
> > Today, when a peregrine falcon flushed shorebirds at the Eckman Lake Outfall into Alsea Bay I captured an image of five greater yellowlegs gliding back in for a landing. After getting home and looking at the image I found that 4 of the 5 birds were missing their inner primaries due to wing molt. Take a look at the attached photo. Their wings look pretty funky and not very aerodynamic.
> > Roy
> > </mail/u/0/s/?view=att&th=15d6838c81d89306&attid=0.1.1&disp=emb&zw&atsh=1>