NEGRO, J.J., J.M. GRANDE & J.H. SARASOLA. 2004. Do Eurasian Hobbies (Falco subbuteo) have «false eyes» on the nape? Journal of Raptor Research 38(3): 287-288.
Abstract: We propose that the two whitish or creamy-colored spots on the nape of the Eurasian Hobby (Falco subbuteo; Fig. 1), are «false eyes» or ocelli, resembling a similar feature described for American Kestrels (F. sparverius Clay 1953, Wilson Bull. 65:129-135). In both Eurasian Hobbies and American Kestrels, the «false eyes» confer an owlish appearance to the individuals when viewed from the rear (Figs.1 and 2). Even though hobbies have been extensively studied in Europe and their plumage patterns have been thoroughly described in raptor books and bird field guides, this is, to our knowledge, the first time that «false eyes» are hypothesized to be present in this species.
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