Morphometric differentiation between subspecies of Resplendent Quetzal (Pharomachrus mocinno mocinno and P. m. costaricensis) based on male uppertail-coverts

Ulrich Schulz, Knut Eisermann
2017 Bulletin of the British Ornithologists' Club  
doi:10.25226/bboc.v137i4.2017.a6 fatcat:usa6fbm2hzgpzbwed7cwtxyx7y