Natura Publishing Haus

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Excellent guide for bird feathers identification by Marian Cieślak and Bolesław Dul as an effect of 15 years of their research and studies. The guide is illustrated with over 250 photos to assist in feathers identification. Feathers are presented as a wing formula of 60 species of bird. In many cases it shows feather variability in relation to sex and age. This guide has been prepared for experts as well as enthusiasts for ornithology.