Data Zone
Justification of Red List category
This species is listed as Near Threatened on the basis of estimated declines in the adult population at a protected area in Brazil. The drivers of the declines are not well understood, but on the basis of the the species' apparent rarity in other large protected areas of cerrado, a population-wide decline approaching 30% over three generations is suspected to have taken place.
Population justification
The global population size has not been quantified. The species is described as rare to locally fairly common. In shrubby areas with grass and scattered trees along the Agua Fria road near Chapada dos Guimar, for example, 1-2 pairs per km were recorded in limited roadside surveys (del Hoyo et al. 2004).
Trend justification
The species is feared to decline in line with the loss and conversion of its cerrado habitat.
An estimated decline of 13% occurred in the adult population at Estação Ecológica de Águas Emendadas, Brazil, between 2003 and 2007 (L. F. França and M. A. Marini in litt. 2008, França and Marini 2010). The drivers of declines are not well understood: this site is apparently well protected and has apparently suffered little anthropogenic alteration since its formal protection. However, on the basis of apparent rarity in other large protected areas of cerrado, it is precautionarily suspected that these declines are representative for the entire range and that they are continuing at this rate to the present day. Consequently, the total population is suspected to have declined by 24% over the past ten years.
Guyramemua affinis is resident in central and south-western Brazil (Maranhão, Pará, Tocantins, Mato Grosso, Bahía, Goiás, Mato Grosso do Sul) and north-eastern Bolivia (Santa Cruz, Beni).
It is a resident of cerrado, campo cerrado and campo sujo, reaching highest densities in moderately closed shrubby areas with a relatively high grass component and scattered 2-5 m tall trees (del Hoyo et al. 2004). It is most common between 250 and 750 m but may ascend as high as 1,200 m (del Hoyo et al. 2004). It feeds on small arthropods and fruit, and forages in the middle and upper branches of trees, rarely descending near the ground (del Hoyo et al. 2004). The primary breeding and fledging period is thought to be October, but little is known about its breeding behaviour (del Hoyo et al. 2004).
The primary threat to cerrado habitat is habitat conversion for Eucalyptus and pine plantations, livestock farming and large-scale cultivation of soybeans, rice and other crops. Repeated annual burning during the dry season may be an additional threat and some areas may be threatened by urbanisation (del Hoyo et al. 2004). Unexplained declines of 13% were noted in the adult population at Estação Ecológica de Águas Emendadas (Brazil) between 2003 and 2007 at an apparently well-protected reserve of 100 km2 which has suffered little modification (L. F. França & M. A. Marini in litt. 2008, França and Marini 2010). The decline may be due to low and variable breeding success (França and Marini 2009, 2010).
Conservation Actions Underway
It occurs in Noel Kempff Mercado National Park in Bolivia and Chapada dos Guimarães National Park in Brazil (del Hoyo et al. 2004), as well as Águas Emendadas Ecological Station, Brazil.
16cm. Medium-sized tyrant-flycatcher. Crown medium grey, olive-washed back, white supercilium, darker wings and tail, feathers with pale outer webs and white tips, throat and breast white, belly and undertail pale yellow. Dark eye, black bill and grey legs. Similar species Told from similar Suiriri Flycatcher Suiriri suiriri by yellow belly and broader whitish tip to tail, and from S. suiriri affinis by shorter and broader bill, darker dorsal surface of tail, white of throat extending up to gape, from S. s. bahiae by darker and less green back, less white breast, paler rump and uppertail-coverts. Voice Paired male and female give different songs in simultaneous duets; male a loud series of paired couplets, a repeated twangy "where where, whooz it", female a loud bubbly rattle of variable length, typically preceeded by one or two "whur" notes.
Text account compilers
Hermes, C.
Contributors
Butchart, S., Ekstrom, J., França, L., Lopes, L.E., Marini, M., Paula de Faria, L.R., Sharpe, C.J. & Symes, A.
Recommended citation
BirdLife International (2024) Species factsheet: Chapada Flycatcher Guyramemua affinis. Downloaded from
https://datazone.birdlife.org/species/factsheet/chapada-flycatcher-guyramemua-affinis on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.