PROFILPELAJAR.COM

Stresemann's bristlefront
Conservation status
	; Critically Endangered (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Rhinocryptidae
Genus:	Merulaxis
Species:	M. stresemanni
Binomial name
	Merulaxis stresemanni; Sick, 1960

Stresemann's bristlefront (Merulaxis stresemanni) is a critically endangered species of bird in the family Rhinocryptidae, the tapaculos. It is endemic to Brazil.^[2]^[1]

Taxonomy and systematics

Stresemann's bristlefront and the slaty bristlefront (Merulaxis ater) form a superspecies, and the two might actually be one species. It has no subspecies. It is known only from three specimens and a few photographs, audio recordings, and sight records.^[3]^[4]

Description

Stresemann's bristlefront is a medium-sized, long-tailed bird with distinctive forehead bristles. It measures 20 cm (7.9 in) long. The male is all slaty gray with a dark rufous-chestnut rump, uppertail-coverts, and vent. The namesake features are long, pointed bristles on the forehead. The female is cinnamon-brown above, with a duskier tail, and is bright cinnamon below.^[5]

Distribution and habitat

Stresemann's bristlefront's natural habitat is subtropical or tropical moist lowland forest. It is threatened by habitat loss, and the Mata do Passarinho Reserve is the last known area to house Stresemann's bristlefront. The Atlantic forest reserve is in the states of Minas Gerais and Bahia and contains primary forest as well as secondary forest, and is an island of forest surrounded by farmland.^[6]

Behavior

Feeding

A Stresemann's bristlefront was observered "foraging on the ground and on fallen tree trunks in an area of drier forest between two humid valleys". It has been seen to feed on insects.^[5]

Breeding

The first known Stresemann's bristlefront nest site was a tunnel estimated to be 6 ft (1.8 m) long. The nest itself was not described.^[5]

Vocalization

Songs and calls

Listen to Stresemann's bristlefront on xeno-canto

The Stresemann's bristlefront song starts with clicks followed by a trill. It is similar to that of the closely related slaty bristlefront but lower pitched. It readily responds to playback.^[4]

Status

The Stresemann's bristlefront is one of the rarest birds on earth. The IUCN has assessed it as Critically Endangered. An extensive search was performed in 2019, and the species was last seen in a tiny forest remnant, now set aside as the Mata do Passarinho Reserve. The IUCN believes that fewer than 50 mature individuals survive.^[1] "The species' known range is tiny (35 km² (14 sq mi))...and the little remaining forest is disappearing rapidly; although this species is legally protected, there seems little hope for its survival."^[4]

References

^ ^a ^b ^c BirdLife International (2018). "Stresemann's bristlefront Merulaxis stresemanni". IUCN Red List of Threatened Species. 2018. Retrieved 13 July 2021.
^ Gill, F.; Donsker, D.; Rasmussen, P. (January 2021). "IOC World Bird List (v 11.1)". Retrieved January 14, 2021.
^ Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 19 January 2021. A classification of the bird species of South America. American Ornithological Society. http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved January 19, 2021
^ ^a ^b ^c Krabbe, N., T. S. Schulenberg, and C. J. Sharpe (2020). Stresemann's Bristlefront (Merulaxis stresemanni), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.strbri1.01 retrieved July 13, 2021
^ ^a ^b ^c BirdLife species factsheet for Merulaxis stresemanni
^ "Expansion of Brazilian reserve protects some of the world's rarest birds". Birdguides. 7 January 2016. Retrieved 7 January 2016.