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THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 123. No. 2. June 2011 
Barbet ( Capito wallacei ) of the Cordillera Azul in 
Loreto. Peru was fairly common at the upper 
Shinipo Valley site and also detected in the upper 
Tzipani Valley. Four male and four female 
specimens as well as photographs and recordings 
were obtained. A more complete description of 
this taxon will be presented elsewhere. 
Cinereous-breasted Spinetail ( Synallaxis hypos- 
podia). —We found this species fairly common 
both in grassy savanna at Monte Tabor and in 
shrub-dominated savanna at Oventeni. We ob¬ 
tained one male and one female specimen as well 
as photographs and audio recordings. S. hypospo- 
dia was previously known in Peru from only three 
isolated localities: the Mayo River drainage (D. F. 
Lane, unpubl. data), the Urubamha Valley (von 
Berlepsch and Stolzmann 1906, Chapman 1921), 
and Pampas del Heath (Louisiana State University 
Museum of Natural Science [LSUMNS] speci¬ 
mens). Our observations constitute the first 
records for Ucayali. 
Rusty-backed Anlwren ( Formicivora rufu ).— 
This species was fairly common in shrub-dominat¬ 
ed savanna at Oventeni, but also present in taller 
graminaceous savanna at Monte Tabor. Single male 
and female specimens were obtained, as were 
photographs and audio recordings. This species is 
known in Peru only from three locations: the 
Huallaga Valley (Bond 1955), Urubamba Valley 
(von Berlepsch and Stolzmann 1906, Chapman 
1921), and Pampas del Heath (LSUMNS speci¬ 
mens). These records are the first for Ucayali. 
White-browed Antbird (Myrmoborus leu- 
cophrys koenigorum). —This species was uncom¬ 
mon to fairly common in more xeromorphic 
woodland with dense understory and forest 
patches bordering savanna at Monte Tabor and 
Oventeni, where we obtained photographs and 
audio recordings. Most birds observed appeared to 
represent the subspecies koenigorum based on 
their extensive white caps and relatively dark 
underparts. This recently-described subspecies is 
known previously only from the Huallaga Valley 
in Huanuco, San Martin, and adjacent Ucayali (D. 
F. Lane and B. P. Walker, unpubl. data: LSUMNS 
specimens). However, as noted for the Huallaga 
Valley (O’Neill and Parker 1997), we found that 
some individuals had relatively dark caps resem¬ 
bling the nominate subspecies of the Amazonian 
lowlands. Further research into the taxonomic 
status of these populations is needed. 
Barred Antthrush ( Chamaeza mollissima). —A 
single individual ol this species was heard on 2 
and 4 October 2008 in montane evergreen forest 
at 1,900 m along the ridge separating the Rio 
Tzipani and Rio Shaani watersheds. A recording 
was obtained on 2 October. Short-tailed Antthrush 
(C. cantpanisona ) was common at lower eleva¬ 
tions in transitional forest, but Barred Antthrush 
was the only Chamaeza detected in humid 
montane forest at high elevation. This locality is 
within what was thought to be a gap in the 
distribution of this species, previously known in 
Peru only from north of the Mayo Valley and 
southeast of the Apurimac Valley (Schulenberget 
al. 2007). 
Plain-backed Antpitta ( Grallaria haphmnta).— 
Two individuals were recorded in montane 
evergreen forest at 1,850-1,900 m in the upper 
Shaani Valley and later identified (D. F. Lane and 
T. S. Schulenberg, pers. comm.); this is a 
significant southward extension from the current 
range limit of this species in San Martin north of 
the Mayo Valley (Schulenberg et al. 2007). 
Tapaculo species (Scytalopus spp.).—We found 
two taxa of Scytalopus that apparently replace 
each other clevationally in the southern Sira and 
Gran Pajonal. Birds with vocalizations consistent 
with the Peruvian endemic Rufous-vented Tapa- 
culo were regularly heard and recorded, and rarely 
glimpsed between 1,700 and 2.200 m. The song of 
this taxon was a single note repeated at 1-4 notes/ 
sec usually for 30 sec or longer. This species was 
one of the more common birds by voice both in 
the upper Shaani Valley and in elfin forest, and 
even patches of scrub up to just below the summit 
of Menkoremon. A faster-paced Scytalopus song 
was heard and recorded between 1.400 and 
1.600 m in the upper Santeni Valley and atCem? 
Quitchungari. This song consisted of a single note 
repeated at a rate of 7-9 notes/sec. often for 12 to 
20 sec. Each phrase was frequently initiated with 
an excited rising-descending jumble of faster- 
paced notes. This song type is consistent with the 
songs of southern populations of Northern White - 
crowned Tapaculo ( Scytalopus atratus) in the 
Cordillera Azul and Cuzco (Krabbe and Schulen¬ 
berg 1997: D. F. Lane. pers. comm ). 
Sooty-headed/Yungas Tyrannulet ( PhyUomyu a 
griseiceps/vi-eedeni). —A tyrannulet species was 
fairly common in forest patches al Oventeni. and 
also recorded in the upper Santeni Valley. 31 
Monte Tabor, and at Cerro Quitchungari. Photo¬ 
graphs and audio recordings were obtained. Song' 
given by individuals appear to be intermediate 
between those of these similar species, containing 
