Authenticated (20/05/08) by Dr. Sundev Gombobaatar, Associate Professor, Zoology Department, National University of Mongolia. Vice President, Mongolian Ornithological Society.
http://www.mos.mn,
info@mos.mn,
mongolianbirds@mail.com.
Hybridisation: Cross-breeding with a different species.
Primaries: In birds, the outer flight feathers.
Secondaries: The shorter flight feathers projecting along the inner edge of a bird's wing.