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.
Glossary
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.