Spix's Guan
Penelope jacquacu
Large, stocky brown bird. Largely arboreal, but often seems too large or clumsy for its tree-dwelling habits. Calls loudly when flushing from a tree and makes crashing noises as it lands roughly in another tree. Found around forest edges and young forest as well as in more mature forests. Typically found singly or in pairs, occasionally in larger groups. Larger and darker than chachalacas with more prominent red skin on throat.
Identification
The four subspecies of Spix's guan differ in weight and plumage, and there are intergrades between them. Their length is 66–76 cm (26–30 in). The male and female nominate P. j. jacquacu weigh 1.24–1.36 kg (2.7–3.0 lb) and 1.14 kg (2.5 lb) respectively. The male P. j. orienticola weighs 1.40–1.78 kg (3.1–3.9 lb) and the female 1.27–1.72 kg (2.8–3.8 lb). The nominate subspecies is bronzy olive green above and bright reddish below. "Grant's" is much darker; the upper parts have a blue-green gloss and the red underside is dark. P. j. speciosa's plumage is similar to that of the nominate subspecies and P. j. orienticola's size and color scheme are between those of the nominate and "Grant's".
Taxonomy
Four subspecies of Spix's guan are recognized, "Grant's" guan (P. j. granti) and the "Spix's guan" group of P. j. jacquacu, P. j. orienticola, and P. j. speciosa. It was at times considered conspecific with dusky-legged guan (P. obscura) or crested guan (P. purpurascens). P. j. speciosa was once considered a race of dusky-legged guan, and "Grant's guan" was formerly considered a separate species.
- Scientific name
- Penelope jacquacu
- Authority
- Spix, 1825
- Order
- Galliformes
- Family
- Cracidae
- Genus
- Penelope
Range and habitat
Spix's guan is found in the upper Orinoco River and western Amazon River basins of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela. From north to south the subspecies sequence is granti, orienticola, jacquacu, and speciosa. It inhabits both terra firma and várzea (seasonally flooded) forest. In the upper elevations of Peru and Bolivia it is in cloud forest and at lower elevations it is in humid rainforest. The species is assumed to be sedentary.
- Migration
- Resident species
Behavior
The timing of Spix's guan's breeding varies geographically; examples include from January to May in Venezuela and August and September in Peru. The one nest that has been described was made of leaves and placed about 5 m (16 ft) up in a tree. The incubation and fledging periods are not known.<p>Spix's guan forages singly or in small family groups, mostly from the middle to the tops of trees but in some regions on the ground. Its diet is mainly fruits and seeds though it has also been reported to follow army ants to take arthropods.
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
Other Birds
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Black-billed Nightingale-Thrush
Catharus gracilirostris
Small skulking thrush, more often heard than seen. Distinctive if seen well: all gray, slightly browner above, with blacker cap. Bill and legs are dark. Dark eye distinguishes from Slaty-backed Nightingale-Thrush. Sexes alike. Found in forest, always low; can be seen along trails and is often less shy than other nightingale-thrushes. Song consists of simple flutelike phrases, often repeated.
Dugand's Antwren
Herpsilochmus dugandi
Handsome antwren found in the canopy of lowland rainforest in eastern Ecuador, northeastern Peru, and southern Colombia. Male is gray with black crown, eye-stripe, and upper tail; wings are black with white bars and tail has white edges. Female is similar but with a brown crown and buffy or yellowish wash on breast. Compared to Ancient Antwren, male Dugand’s lacks yellow on underparts, and female has a brown crown. Usually seen with mixed-species flocks very high in the trees. More easily seen from a canopy tower or walkway if one is available. Song is a fast, accelerating series of dry “chup” notes.
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