Finally, the work of Wilfried Hansen and Dr. Jurgen Synnatzschke is available as a book. So far, it was scattered in 11 separate issues of the scientific journal Beitrage zur Naturkunde Niedersachsens and only accessible to a small number of experts. In the meantime, these issues are all out of print. They have now been revised, updated with extensive new data and united into a single book. The resulting monograph treats the tail feathers (rectrices) of the birds of Central Europe. The identifying characters of the tail feathers of more than 300 bird species are described in detail and...
Finally, the work of Wilfried Hansen and Dr. Jurgen Synnatzschke is available as a book. So far, it was scattered in 11 separate issues of the scienti...
