9 May 2014 – Clay-colored Sparrow and Orchard Oriole

From two casualties since December to five just this week, it looks like migrant activity has picked up at the Noble Research Center.  The northwest alcove was deadly last night for the third time this week, and I flushed a migrant Wilson’s Warbler from there this morning too. Today it was an unfortunate Clay-colored Sparrow (SY-U, fat = 3):

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The southeast alcove claimed a victim as well:  this second-year male Orchard Oriole (fat = 2):

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This is the second of these beautiful orioles that I’ve found dead at the NRC, and both were SY males.  Both also broke the tips of the bill on impact, illustrating both how delicate that structure is on this species and how birds hit glass with no idea that there is a barrier in front of them.

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