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Pallid vs Common Swift (1 Viewer)

ecrvich

Active member
United States
Barcelona yesterday. Any way to separate them based on these mediocre photos? Same bird in all pics.
 

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Hello,

with thanks to all on another recent thread here:
I am in the Pallid camp here:
  • although enhanced by full crop, the whitish troat seems large and the pale front of the head seems better for this
  • Broad hips result in a shape better for Pallid imo
  • Scaly underparts and paler brown colouration are unusual for Common Swifts
But better wait and as always thanks from me too!
 
Hello,

with thanks to all on another recent thread here:
I am in the Pallid camp here:
  • although enhanced by full crop, the whitish troat seems large and the pale front of the head seems better for this
  • Broad hips result in a shape better for Pallid imo
  • Scaly underparts and paler brown colouration are unusual for Common Swifts
But better wait and as always thanks from me too!

Convincing to me! Thank you! :)
 
As you said, Ernest's reply is very convincing, and confirms they are pallid swifts. Your photos also illustrate how difficult it is to ID species pairs by tone - in the strong light, the shaded underside looks very dark indeed, whereas sunlight on the upper wing would no doubt reveal (and accentuate) a much paler, characteristically 'two tone' colouration of pallid swift.
In terms of geography / timing, I was out in SW Iberia today and only saw pallid swifts. Paradoxically in more northerly latitudes there are sometimes still some late-fledging juvenile common swifts around in early September, resulting from late arrival of breeding birds.
 

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