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      Azara’s No. 21 “Gavilán pardo obscuro” is not a Short-tailed Hawk Buteo brachyurus

      Neotropical Biology and Conservation

      Pensoft Publishers

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          Abstract

          Almost half of the 400+ species described in Félix de Azara’s “Apuntamientos para la historia natural de los páxaros del Paraguay y Rio de la Plata” were new to science at the time of its publication; however, not all of these have yet been correctly identified. Azara’s No. 21 “Gavilán pardo obscuro” has long been misidentified as a dark phase of the Short-tailed Hawk Buteo brachyurus. However, the description of plumage, jizz, habitat and measurements are inconsistent with that species and Azara’s No. 21 can, in fact, be convincingly identified as a juvenile Swainson’s Hawk Buteo swainsoni, the earliest Paraguayan report of this species. No scientific names were apparently ever based on Azara No. 21.

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          Most cited references 7

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          Routes and Travel Rates of Migrating Peregrine Falcons Falco peregrinus and Swainson's Hawks Buteo swainsoni in the Western Hemisphere

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            Aves nuevas del Paraguay continuación á Azara.

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              North American Bird Migrants in Paraguay

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                Author and article information

                Contributors
                Journal
                Neotropical Biology and Conservation
                NBC
                Pensoft Publishers
                2236-3777
                October 01 2020
                October 01 2020
                : 15
                : 4
                : 409-414
                Article
                10.3897/neotropical.15.e55611
                © 2020

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