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Poster on morphometric variation of Fork-tailed Flycatchers

  Posted by Alex Jahn , 09 October 2014 · 1,388 views

At the recent American Ornithologists’ Union annual meeting in Colorado, Ivan Celso Carvalho (a student at the Universidade Estadual Paulista, Rio Claro, Brazil), presented a poster on the morphometric variation of wings of Fork-tailed Flycatchers (Tyrannus savana): AOU poster





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Colombia 2014

  Posted by Alex Jahn , 06 May 2014 · 1,490 views

Map of sites where different subspecies of Fork-tailed Flycatchers were seenAs part of a study on the evolution of bird migration in South America, we are studying migratory and non-migratory populations of Fork-tailed Flycatchers, both of which occur in Colombia. Two non-migratory subspecies occur Colombia: Tyrannus s. monachus occur in several...


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La Pampa 2013

  Posted by Alex Jahn , 24 December 2013 · 1,277 views

We are currently in La Pampa Province, Argentina monitoring nests, catching, measuring and deploying geolocators on Fork-tailed Flycatchers and Vermillion Flycatchers. Field crew members are Jose Sarasola, Miguel Santillan, Joaquin Cereghetti (Universidad Nacional de La Pampa), Valentina Gomez (Universidad de los Andes), and Alex Jahn (Universid...


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Brasilia 2013

  Posted by Alex Jahn , 13 October 2013 · 1,260 views

Brasilia 2013 We are currently in Brasilia, the capital of Brazil, where Tropical Kingbirds (Tyrannus melancholicus ) and Fork-tailed Flycatchers (Tyrannus savana ) nest. We work in Parque Alvorada, an urban park, monitoring nests and banding birds. Tropical Kingbirds are found in Brasilia year-long and may be partial migrants here. Fork-tailed Flycatchers are migrato...


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La Pampa 2013

  Posted by Alex Jahn , 27 September 2013 · 1,197 views

La Pampa 2013 The pampas of central Argentina are the wintering grounds of several Nearctic-Neotropical migrants (e.g., Swainson’s Hawks, Upland Sandpipers), as well as the breeding grounds of several species of austral migrants, including Fork-tailed Flycatchers.

Alex Jahn visited the Province of La Pampa to attend the Reunion Argentina de Ornitologia, as well as to...






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