The olive-crowned crescentchest (Melanopareia maximiliani ) is a species of bird in the family Melanopareiidae. It is found in Argentina, Bolivia, and Paraguay.
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe olive-crowned crescentchest is 15 cm (5.9 in) long. Males weigh 17.1 to 18.0 g (0.60 to 0.63 oz), one female weighed 16.7 g (0.59 oz), and unsexed specimens weighed 16.9 to 18.2 g (0.60 to 0.64 oz). The nominate subspecies' crown and upperparts are olive-brown, the throat deep buff, and the chest and belly ochraceous. It has a narrow buff supercilium with a black mask below and a black crescent and chesnut band between the throat and chest. M. m. argentina is similar but has paler underparts. M. m. pallida is paler still, its throat is more cinnamon than buff, and the facial mask is a lighter black.
The nominate subspecies of olive-crowned crescentchest is found in La Paz Department of western Bolivia. M. m. argentina is found from central Bolivia to northwestern Argentina. M. m. pallida is found in southeastern Bolivia, western Paraguay, and northern Argentina. The species generally inhabits dry scrub and grassy areas with small bushes, but M. m. pallida also frequents sawgrass in the Chaco Basin. It ranges in elevation mostly from 1,700 to 2,950 m (5,580 to 9,680 ft) but is found as low as 1,200 m (3,900 ft) in Argentina.
The olive-crowned crescentchest usually forages alone, but sometimes in pairs, by hopping through dense cover on or near the ground. Its diet has not been recorded.
In Argentina the olive-crowned crescentchest breeds from September to December; an active nest was found in October in central Bolivia. Two nests of M. m. pallida were cups of vegetable fiber and palm leaves; they were hidden not far above the ground. One nest of M. m. argentina was a tunnel lined with grass. The species' clutch is two or three eggs.
