Rough-legged Tyrannulet © theflipflop.life

Genus as presently constituted may be polyphyletic; objective phylogenetic analysis, using molecular characters as well as anatomical ones, is required in order to define generic limits. Anatomical evidence suggests that Planalto Tyrannulet (Phyllomyias fasciatus), Grey-capped Tyrannulet (Phyllomyias griseocapilla) and Sooty-headed Tyrannulet (Phyllomyias griseiceps) may be unrelated to others of genus, some or all of which possibly better placed in resurrected genus Tyranniscus. Present species was for long treated in its own genus, Acrochordopus, because of distinctively serrated tarsus, but tarsal scutellation now known to be unreliable as a generic character in the family. Nominate subspecies and zeledoni sometimes considered to represent two distinct species, with the other four ("leucogonys group") forming a third species, but biological information about all populations remains scarce, and vocal and genetic relationships not yet studied. Investigation is needed especially in area of possible contact between leucogonys and nominate in southern Peru and northern Bolivia.

The following 6 subspecies are recognised:

• zeledoni Cabanis & Heine, 1859   -  Costa Rica, Panama, also north-western SA. Considered by some authors to be a distinct species, White-fronted Tyrannulet (Phyllomyias zeledoni).
• wetmorei (Aveledo and Pons, 1953)   -  Sierra de Perijá, in western Venezuela. Considered by some authors to be a subspecies of White-fronted Tyrannulet (Phyllomyias zeledoni).
• viridiceps (J. T. Zimmer and Phelps, Sr, 1944)   -  Mountains of northern Venezuela. Considered by some authors to be a subspecies of White-fronted Tyrannulet (Phyllomyias zeledoni).
• bunites (Wetmore and Phelps, Jr, 1956)   -  Chimantá-tepui, in south-eastern Bolí­var (eastern Venezuela). Considered by some authors to be a subspecies of White-fronted Tyrannulet (Phyllomyias zeledoni).
• leucogonys (P. L. Sclater and Salvin, 1871)   -  Eastern Andes from Colombia south to south-eastern Peru. Considered by some authors to be a distinct species, White-fronted Tyrannulet (Phyllomyias leucogonys).
• burmeisteri Cabanis & Heine, 1859   -  Eastern Andes of Bolivia and northern Argentina, also locally from eastern and south-eastern Brazil to south-eastern Paraguay.

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BirdLife International For more information about the Rough-legged Tyrannulet see... BirdLife International Species Factsheet. Articles about the Rough-legged Tyrannulet If you would like to read any articles about the Rough-legged Tyrannulet... Show Articles (0) No Pictures of Rough-legged Tyrannulet If Birdpedia has no pictures of Rough-legged Tyrannulet or you would like to see more, then try the following...       From BING (7) No Videos of Rough-legged Tyrannulet If Birdpedia has no videos of Rough-legged Tyrannulet or you would like to see more, then try the following..       From BING (0) Where can I observe this species? Select an area (or leave blank) to see locations where this species has been recorded. Area   COSTARICA COCOS   All    Optional: Complete the following if you wish to restrict the reserve to within a given distance of a location. Please enter the Latitude and Longitiude of a given location together with the maximum distance (km) to display a list of reserves within that distance. You must enter a Latitude, a Longitude and a distance greater than 0.   Latitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          N S or   GPS help Longitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          E W or   Find GPS using Google Maps Distance Bearing     N NE E SE S SW W NW Get Sample GPS readings On What Field Trips was this species observed? Select an area (or leave blank), and a date range, to see field trips on which this species has been recorded. Area   COSTARICA COCOS   All    From To     Optional: Complete the following if you wish to restrict the reserve to within a given distance of a location. Please enter the Latitude and Longitiude of a given location together with the maximum distance (km) to display a list of reserves within that distance. You must enter a Latitude, a Longitude and a distance greater than 0.   Latitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          N S or   GPS help Longitude: (Decimal degrees takes precedence) Deg Min Sec     Decimal degrees (Include compass setting or value)          E W or Distance Bearing     N NE E SE S SW W NW Get Sample GPS readings Latest Sightings for Rough-legged Tyrannulet Select the Area to restrict the Sightings. Area   COSTARICA COCOS   All