The southern beardless tyrannulet is a small passerine bird in the tyrant flycatcher family. It breeds from Costa Rica through South America south to Paraguay, Bolivia, and Argentina.
The torrent tyrannulet is a small bird of the tyrant flycatcher family. It breeds from Costa Rica south to northern Bolivia and northwestern Venezuela.
The Pacific baza, also known as the crested hawk, crested baza, and Pacific cuckoo-falcon, is a slender, medium-sized species of hawk in the family Accipitridae. It is mostly grey, brown, and white coloured and grows to a length of 35–46 centimetres (14–18 in). It is an omnivore and usually does not migrate. The breeding season for the species lasts from September to at least February, during which time specimens commonly fly and vocalise for display. It lives in Australia, Indonesia, Papua New Guinea, Solomon Islands, and East Timor, in forests, savannas, and freshwater bodies. The International Union for Conservation of Nature lists it as a least concern species.
The crested spinetail is a species of bird in the family Furnariidae in northern South America. It is found in Colombia and Venezuela. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. The species inhabits a wide variety of forest and scrub habitats below 1500 meters in elevation.
The sooty tyrannulet is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is small, usually weighing 9 grams with a length of 12 centimeters, and has gray or brownish-grey feathers with black tail feathers. It is found in Argentina, Brazil, and Uruguay; also southern Paraguay. A small extension of its range is in southeastern Bolivia.
Straneck's tyrannulet, also known as the monte tyrannulet and grey-crowned tyrannulet, is a small species of bird in the family Tyrannidae. It is found in woodland and open habitats with scattered bushes and trees in south-central South America, but the details are still unclear. It breeds in Argentina, but may also breed in Bolivia. In addition to these countries, it has been recorded as a non-breeding visitor in Paraguay, and possibly Brazil and Uruguay. Visually it closely resembles the white-crested tyrannulet, but its voice is distinctive and its tail shorter. Considerable taxonomic confusion has surrounded this species, which for a period mistakenly was referred to by the scientific name Serpophaga griseiceps, a junior synonym of Serpophaga munda. Consequently, the Straneck's tyrannulet only received its scientific name in 2007 despite having been known since the early 1990s.
