Siberian chiffchaff Siberian chiffchaff Siberian chiffchaff ("Phylloscopus (collybita) tristis") is a leaf-warbler which is usually considered a subspecies of the common chiffchaff, but may be a species in its own right. Siberian chiffchaff breeds in Siberia east of the Pechora River and winters in the lower Himalayas. It is also regularly recorded in western Europe in winter, and it is likely that the numbers involved have been underestimated due to uncertainties over identification criteria, lack of good data and recording policies (Sweden and Finland only accept trapped birds). Because of their unfamiliar appearance, British records in the 1950s and 1960s were originally
The Genius of Birds The Genius of Birds The Genius of Birds is a 2016 book by nature writer Jennifer Ackerman. "The Genius of Birds" highlights new findings and discoveries in the field of bird intelligence. The book explores birds as thinkers (contrary to the cliché "bird brain") in the context of observed behavior in the wild and brings to it the scientific findings from lab and field research. New research suggests that some birds, such as those in the family corvidae, can rival primates and even humans in forms of intelligence. Much like humans, birds have enormous brains relative to the rest of