Passeriformes
Roundish or knobbed villi at the bases of the barbules is a character unique to this order.
In most species nodes are bell-shaped, pigmented and equally distributed along the entire length of the barbule (over 30 nodes per mm). Species examined within this order: Ammomanes deserti, Calandrella brachydactyla, Galerida cristata, Alauda arvensis, Riparia riparia, Hirundo rustica, Delichon urbica, Anthus pratensis, Motacilla cinerea, Motacilla alba, Pycnonotus barbatus, Prunella modularis, Cercotrichas galactotes, Erithacus rubecula, Phoenicurus phoenicurus, Cercomela melanura, Saxicola torquata, Oenanthe oenanthe, Oenanthe deserti, Oenanthe lugens, Oenanthe leucopyga, Turdus merula, Turdus philomelos, Prinia gracilis, Scotocerca inquieta, Acrocephalus scirpaceus, Acrocephalus stentoreus, Hippolais pallida, Sylvia melanocephala, Sylvia rueppelli, Sylvia hortensis, Sylvia borin, Sylvia atricapilla, Phylloscopus collybita, Phylloscopus trochilus, Muscicapa striata, Turdoides squamiceps, Parus caeruleus, Parus major, Nectarinia osea, Lanius excubitor, Lanius senator, Garrulus glandarius, Corvus monedula, Corvus corone, Corvus ruficollis, Corvus rhipidurus, Onychognathus tristramii, Sturnus vulgaris, Passer domesticus, Passer hispaniolensis, Fringilla coelebs, Carduelis chloris, Carduelis carduelis, Carduelis cannabina, Rhodospiza obsoleta, Emberiza schoeniclus, Emberiza melanocephala, Miliaria calandra.