The Sooty Tyrannulet is a water-associated tyrant that is distributed broadly across southeastern South America. This tiny flycatcher is dark gray-brown above and paler gray below, with two dusky wingbars on each wing and a white crown patch, usually hidden unless agitated. The species is highly associated with water, typically small streams or ditches in agricultural or otherwise open areas below 1000 meters in elevation. Sooty Tyrannulets are always moving around within their habitat, and typically flare and jerk their tails upwards when alert or alarmed. [Source: http://neotropical.birds.cornell.edu/portal/species/overview?p_p_spp=429001].