Guilherme and Borges • BIRDS OF THE UPPER JURUA RIVER, ACRE, BRAZIL 
29 
traits and vocalization patterns. We decided 
against classifying the MPEG 62088 specimen 
as Zimmer’s Antbird (M. castanea) because we 
believe a more thorough investigation of the 
Goeldi Museum specimens collected in campinar- 
anas of the southwestern Amazon Basin is 
necessary. A more detailed field study of the 
ecology and vocalizations of individuals with 
these morphological traits is also necessary. This 
would permit more reliable comparisons with the 
characteristics of the Peruvian Zimmer’s Antbird 
(Isler et al. 2002), and a more dependable 
identification of the specimen collected in the 
present study. 
Amazonian Barred Woodcreeper (Dendroco- 
laptes certhia polyzonus). The most common form 
of this taxon in Acre is D. c. juruanus , which has 
been recorded throughout practically the entire 
state (Pinto and Camargo 1954, Novaes 1957, 
Guilherme 2009). We netted four Amazonian 
Barred Woodcreepers between 23 and 27 January 
2007 in the campinarana, three of which were 
collected-one female (MPEG 62042) and two 
males (MPEG 62043-62044). EG concluded, 
upon analyzing specimens in the Museu Goeldi’s 
ornithological collection, that these individuals 
have more striking coloration, including well- 
defined black striping of the pileum, mantle, and 
throat, which is conspicuously different when 
compared with the other specimens of D. c. 
juruanus collected in Acre. The plumage traits of 
the specimens collected in the campinarana during 
the present study appear to coincide with those 
observed in D. c. polyzonus from the southwestern 
edge of Amazonia, Bolivia and Peru (Marantz et 
al. 2003; R. Batista and A. Aleixo, unpubl. data). 
This record of D. c. polyzonus from Acre is the 
first for Brazil. 
Citron-bellied Attila ( Attila citriniventris). This 
species is uncommonly documented in southwest¬ 
ern Amazonia with the majority of specimen 
records from northern Peru (Robbins et al. 1991, 
Schulenberg et al. 2007). The Citron-bellied Attila 
has been recorded in forested habitats in Acre on 
the upper Jurua by Whittaker et al. (2002), and A. 
Aleixo and F. Poletto (unpubl. data). We collected 
two specimens on 22 and 23 January 2007, a 
female (MPEG 62124) and a male (MPEG 
62125), in the campinarana. This species can also 
be found in terra firme forest (Robbins et al. 
1991), but we believe it is more closely associated 
with campinarana habitats than rain forest 
(Alonso 2002, Schulenberg et al. 2007), as 
observed at our study site, and in Jau National 
Park north of the Rio Solimoes (Borges et al. 
2001 ). 
Zimmer’s Tody-Tyrant ( Hemitriccus minimus). 
This species is patchily distributed in the Amazon 
Basin (Fitzpatrick et al. 2004). It occurs in igapo 
forests in the Rio Negro Basin (Novaes 1994, 
Borges et al. 2001) and in terra firme forest in 
Mato Grosso (Zimmer et al. 1997), but this 
species appears in many areas to be closely 
associated with campinarana habitats (Stotz et al. 
1996, Borges et al. 2001, Alonso 2002, Alonso 
and Whitney 2003, Fitzpatrick et al. 2004). We 
collected a male (MPEG 62117) in the campinar¬ 
ana on 23 January 2007. Zimmer’s Tody-Tyrant 
has also been recorded in a campina/campinarana 
enclave in the municipality of Guajara, Amazo¬ 
nas, close to the city of Cruzeiro do Sul in Acre 
(A. Aleixo, unpubl. data) and in a bamboo 
(Guadua spp.) forest in eastern Acre (Guilherme 
and Santos 2009). 
Fuscous Flycatcher (Cnemotriccus fuscatus 
duidae). This taxon has only been recorded in 
western Acre (Guilherme 2009). We collected a 
male and a female C. f duidae (MPEG 62119 and 
62175, respectively) in the campinarana on 22 and 
24 January 2007. We believe C.f duidae in Acre 
is a facultative inhabitant of the campina and 
campinarana formations, given that it has also 
been recorded in other habitats, including sub¬ 
montane forests of Serra do Divisor National 
Park, in the western extreme of the state (B. M. 
Whitney, unpubl. data; MPEG 52797). Alonso 
(2002) suggests C. f duidae is better treated as a 
distinct species (Cnemotriccus duidae) given 
differences in plumage, vocalizations, and habitat 
preferences compared to those of other taxa in the 
complex. He noted that a taxonomic revision of 
the C. fuscatus complex is in preparation by B. M. 
Whitney and collaborators. 
Black Manakin ( Xenopipo atronitens). This 
species is an Amazonian white-sand habitat 
specialist (Oren 1981, Stotz et al. 1996, Borges 
2004, Poletto and Aleixo 2005, Schulenberg et al. 
2007). The recorded localities closest to Acre are 
“Pampas del Heath’’ on the Bolivian border in 
southeastern Peru (Graham et al. 1980), and a 
campinarana enclave in the municipality of 
Guajara in southwestern Amazonas on the border 
with Acre (Poletto and Aleixo 2005). Thirteen 
individuals were captured in mist nets set in the 
campinarana between 22 and 31 January. Six were 
collected (MPEG 62141-62146; 4 males, 2 
