Ornith.
a numerical representation of the relative lengths of the primary feathers of a bird's wing, used in identifying similar species, as flycatchers.
[ 1935-40 ]
Ornith.
a numerical representation of the relative lengths of the primary feathers of a bird's wing, used in identifying similar species, as flycatchers.
[ 1935-40 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012