Common chiffchaff Common chiffchaff The common chiffchaff ("Phylloscopus collybita"), or simply the chiffchaff, is a common and widespread leaf warbler which breeds in open woodlands throughout northern and temperate Europe and Asia. It is a migratory passerine which winters in southern and western Europe, southern Asia and north Africa. Greenish-brown above and off-white below, it is named onomatopoeically for its simple "chiff-chaff" song. It has a number of subspecies, some of which are now treated as full species. The female builds a domed nest on or near the ground, and assumes most of the responsibility for brooding and feeding the chicks, whilst
The Origin of Birds in fact, was decidedly reptilian and generally opposed to that of modern birds. This included the pelvis, which lacks a pectineal process and has a very different os sacrum from modern birds, as well as the carpus, which Heilmann wrote exhibited the same phenomena found in the wrists of modern reptiles. Its tail was also noted by Heilmann as being extremely reptilian and resembling nothing known of modern birds. He goes on to state that other features of "Archaeopteryx", however, are remarkably birdlike and bear little resemblance to their reptilian analogues. The hand of "Archaeopteryx" is observed as being one