|Greater Wagtail-tyrant (Stigmatura budytoides)
|Mocambinho, Minas Gerais, Brazil
The Greater Wagtail-tyrant is found in two disjunct areas of the interior of South America. The main area lies between central Bolivia through western Paraguay and into central Argentina. The other area is in north-east Brazil where these photos were taken.
|They normally inhabit arid scrub and chaco woodland so it is no surprise to find them in north-east Brazil in the similar habitat of degraded caatinga.
The subspecies found in north-east Brazil, S. b. gracilis, looks similar to the nominate race though it is slightly smaller. Note the broad yellow supercilium, the large pale patch on the wings and the white tips to the tail.
This area of north-east Brazil is the only place where the Greater Wagtail-tyrant is sympatric with the very similar Lesser Wagtail-tyrant, Stigmatura napensis. At one site where they can be seen together, the Lesser can be seen to be smaller and it also forages lower down than the Greater Wagtail-tyrant.
Ridgely & Tudor state "despite the bird's name, its tail is never exactly wagged" but, as you can detect in the second photo, it can cock its tail quite rapidly.
There is an illustration in Ridgely & Tudor, Volume 2, Plate 33.