Identification pitfalls and assessment problems. 13 Pallas's Warbler Phylloscopus proregulus
01 September 1992
Main paper
This series, which started in January 1983 (Brit Birds 76: 26-28), is not intended to cover all facets of the identilication of the species concerned, but only the major sources o('error likely to mislead the observer in the field or the person attempt...
Read More