Canary Islands chiffchaff an active little bird with quick and frenzied movements, frequently flicking its wings and wagging or flicking its tail. Canary Islands chiffchaff The Canary Islands chiffchaff ("Phylloscopus canariensis") is a species of leaf warbler endemic to the Canary Islands, Spain. Sometimes the English name is spelled Canary Island chiffchaff. Previously the Canary Island chiffchaff was considered as a subspecies of the common chiffchaff ("Phylloscopus collybita"). Now it is recognised as a separate species under the name "Phylloscopus canariensis". There are two recognised subspecies but the Lanzarote subspecies is probably extinct; they are. The Canary Islands chiffchaff is similar to the
Genomic evolution of birds bird bones. Something similar occurs with the respiratory system. In mammals, the total inner volume of lungs changes during ventilation. However, this does not happen in birds. They make the air circulate through their lungs by contracting and expanding their air sacs. Five genes are involved in this process in mammals and birds. Feathers are one of the most characteristic features of birds, alongside with the beak. Feathers are formed of α- and β-keratins. Compared to reptiles and mammals, α-keratin protein family has been reduced in birds, whereas β-keratins has expanded enormously. Since every major bird lineage possess at least