BIRDS OF COSTA RICA

PHOTO LIBRARY

Scaly-throated Leaftosser / Tirahojas Barbiescamado (Sclerurus guatemalensis)

Ageing and sexing overview:

Spring:

AHY - U
Sexes identical; differences between SY and ASY unknown.  

Ageing and sexing details:

SPRING:  AHY-U (after-hatch-year, sex unknown)

Sexes are identical, and it is unknown whether any differences between SY and ASY birds can be seen on perched Scaly-throated Leaftossers.


Photo by Marcel Gahbauer, Las Caletas (CR), April 2008


The wing below appears uniform in colour and condition, which in many species would suggest that the bird is ASY, but not enough is known about the timing and extent of moult in this species to come to that conclusion.


Photo by Marcel Gahbauer, Las Caletas (CR), April 2008


The rectrices appear broad and rounded, which for many species is an indication of an ASY bird, but no conclusions can be made regarding this bird without knowing more about the timing and extent of moult in Scaly-throated Leaftossers, or comparing with a known HY/SY bird to examine the shape and condition of its rectrices.


Photo by Marcel Gahbauer, Las Caletas (CR), April 2008

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2002- The Migration Research Foundation Inc.