taxonID	type	description	language	source
C91F6C45CF5CFFDCFF7D504DA953276D.taxon	discussion	Nearctic migrant. Observed by DP at the edge of HFR on 9 November 2017 (WA 2792378; Fig. 2 A). Only the second record in Acre (Guilherme 2016). Stot et al. (1992) reported the species’ occurrence in neighbouring Rondônia between October and March. This indicates that the record at HFR was within its overwintering period in south-west Amazonia.	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5CFFDCFF7D530DA99727CD.taxon	discussion	Austral migrant. Guilherme (2009) first reported the species in HFR. A female, collected on 20 July 2007, is deposited in Belém (MPEG 63485). The date of this record corresponds to the coldest part of the austral winter in southern Brazil, where the species breeds (Payne 2019 a).	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D545CAEBD209C.taxon	discussion	Bamboo forest specialist. Common in HFR, where invariably observed in bamboo. The territorial song and drumming is audible over long distances, and evidence of its feeding behaviour is often observed on bamboo stalks. A pair with two juveniles observed by TNM on 12 August 2014, in bamboo near the reserve headquarters (Fig. 3 A).	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D513DA927259C.taxon	discussion	Endemic; bamboo forest specialist; Vulnerable. In August – September 2014, TNM observed one in bamboo patches near the reserve headquarters; see Melo et al. (2015) (Fig. 3 B). On 5 June 2018, DPG trapped and ringed (CEMAVE F 55386) one in a bamboo patch, and on 1 August 2018, JML trapped and ringed a second individual (CEMAVE F 63509) in a part of the forest apparently without any major concentration of Guadua bamboo, whereas the species typically occurs in patches of dense bamboo (Tobias et al. 2008). HFR is the northernmost locality at which C. superrufus has been recorded (Melo et al. 2015, Guilherme 2016).	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D55BCAF6B205C.taxon	discussion	Nearctic migrant. One observed by DPG foraging for insects in the canopy on 30 October 2017 (WA 3515980; Fig. 2 B). Breeds in North and Middle America, and migrates to South America in the boreal winter (Payne 2019 b). The date of this record indicates that C. americanus arrives in the region shortly before the start of the boreal winter. Only the third record in Acre (GBIF 2019, Wikiaves 2019).	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D501DAEAE24BC.taxon	discussion	Endemic; bamboo forest specialist; Near Threatened. Recently described species for which few natural history data are available (Zimmer et al. 2013, Melo et al. 2015). One was recorded in a bamboo patch at HFR on 19 November 2018, by R. Plácido (WA 2376966) (Fig. 3 C). The record extends the species’ known range 95 km north of the nearest previously known locality, on the Transacreana highway in Acre (Melo et al. 2015).	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D57DCACE622BC.taxon	discussion	Endemic; bamboo forest specialist. Silva et al. (2015) made the first record in HFR, and DP monitored the species in 2017. In HFR, the species occurs exclusively in bamboo forest, foraging for prey in bamboo culms and leaves. Population density was estimated in 16 - ha grids, with some individuals being banded, at 0.55 – 0.66 pairs per ha in bamboo patches (Pedroza & Guilherme 2019). In DPG’s 2018 study of mixed-species flocks, H. subflava was a constant presence in flocks led by Thamnomanes schistogynus and the flock’s home range coincided with bamboo patches.	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDEFF7D533DAEA421DD.taxon	discussion	Bamboo forest specialist. Silva et al. (2015) first recorded this species in HFR, and TNM subsequently studied its foraging behaviour, which is focused exclusively on bamboo leaves and branches (Melo & Guilherme 2016). Density of R. megacephalum along a 10 - km transect in the study area was estimated 1.5 individuals / km 2, with the species being exclusively recorded in areas of bamboo. In the 2018 study of mixed-species flocks, DPG considered R. megacephalum to be a constant in flocks led by Thamnomanes schistogynus.	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5DFFDDFF7D571CAFB023DC.taxon	discussion	Endemic. Guilherme (2009) presented the first records in HFR. Specimens have been deposited in Belém (MPEG 59967, 59968). Subsequently, in 2018, DPG monitored the species. He found that T. schistogynus is a mixed-species flock leader in HFR, and occurs in bamboo forest and terra firme forest with palms.	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
C91F6C45CF5EFFDEFF7D55DCACC020BD.taxon	discussion	Species associated with bamboos. Guilherme (2009) was the first observer to record R. fuscicauda in HFR. Ecologically more flexible than R. megacephalum, it occurs in both bamboo-dominated habitats and areas without bamboo, although it is commonly found on bamboo, and is observed foraging close to R. megacephalum (Melo & Guilherme 2016). Density of R. fuscicauda along a 10 - km transect in HFR was estimated at 0.8 individuals / km 2. DPG considered this species to be another constant participant in mixed-species flocks led by Thamnomanes schistogynus.	en	Pedroza, Diego, Melo, Tomaz Nascimento de, Machado, Tatiana Lemos da Silva, Guimarães, David Pedroza, Lima, Jônatas M., Guilherme, Edson (2020): Birds of Humaitá Forest Reserve, Acre, Brazil: an important forest fragment in south-west Amazonia. Bulletin of the British Ornithologists’ Club 140 (1): 58-79, DOI: 10.25226/bboc.v140i1.2020.a7, URL: https://bioone.org/journals/bulletin-of-the-british-ornithologists-club/volume-140/issue-1/bboc.v140i1.2020.a7/Birds-of-Humait%c3%a1-Forest-Reserve-Acre-Brazil--an-important/10.25226/bboc.v140i1.2020.a7.full
