By: Eric Gillham and Barry Gillham
104 pages, 53 col & 3 b/w photos
The text furnishes certain data on 161 hybrid combinations. Taking into account adults, ducklings, juveniles and immatures, plus backcrosses, multiple hybrids and those in aberrant plumage, there is mention of about 250 crosses.
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On behalf of Parque Nacional Nahuel Huapi I would like to thank NHBS. The book will be very useful for my students.
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