african piculet altricial amber americas antarctica australasia australia avian incubation bar-breasted piculet barbet beak biodiversity biological classification bird bird migration bird nest black-rumped flameback black woodpecker blythipicus brain damage cactus campephilus campethera caribbean colaptes convergence coracoid cosmopolitan distribution dna sequence dendrocopos dendropicos digital object identifier dominican republic dryocopus eocene eurasian wryneck europe gecinulus gila woodpecker great slaty woodpecker great spotted woodpecker ground woodpecker habitat handbook of the birds of the world hemicircus hispaniola hispaniolan woodpecker honeyguide imperial woodpecker incertae sedis ivory-billed woodpecker jacamar ladder-backed woodpecker madagascar meiglyptes melanerpes miocene mixed-species feeding flock mulleripicus neognathae new providence new zealand nicholas aylward vigors ochre-collared piculet old world oligocene piciformes picinae picoides piculet piculus pliocene plumage puffbird sasia sexual dimorphism south africa southeast asia species toucan veniliornis wikimedia commons woodland wryneck yellow-bellied sapsucker