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Jehl scale analysis of today American Oystercatcher

I received some more pictures of the bird from Aaron Gyllenhaal which show the tail and tail coverts better as well as the upperwing wing stripe.

It keys out conservatively to 34, well within the range of American Oystercatcher.

CHARACTER                             CHARACTER STATE AND
SCORE

Upper
tail coverts             3       white, a few
black mottlings

Tail                           3       basal half of
rectrices white

Edge
on upper breast           3       black chest band
bordered by ragged

Belly                          6       entirely white,
as in palliatus

Under
tail coverts             3       mainly white

Thighs                         4       entirely white,
as in palliatus

Greater
secondary coverts      3       6-15 mm

   (width of white edging     

   in folded wing)            

Extent
of white wing stripe    2       white markings extend to outer
secondaries, but not onto primaries

Underwing
coverts              3       mainly white

Axillars                       4       white, as in palliatus

 

Stan Walens, San Diego
Aug. 30, 2019; 4:40 pm

Source: SanDiegoRegionBirding Latest Reports