Produkt mají v nabídce:
Bird Monitoring Methods - Gilbert, Gillian a Gibbons, David W. a Evans, Julianne
First published by the RSPB in 1998, this book is a practical guide to surveying and monitoring techniques for use in the breeding season - in assessing breeding success as well as population levels - and during the winter. It gives instructions for more than 120 UK bird species, mainly those of conservation concern.
