Pacific Hornero
The Pacific hornero (Furnarius cinnamomeus) is a distinctive member of the ovenbird family, Furnariidae. Known for its striking rufous plumage and remarkable nest-building skills, this bird is found across the western regions of South America. From the lowlands to the subtropical zones, the Pacific hornero has adapted to a variety of environments, making it a resilient presence in the landscapes of Colombia, Ecuador, and Peru.
Key Facts
- Conservation Status: Least Concern (IUCN 3.1).
- Range: Southwestern Colombia, western Ecuador, and northwestern Peru.
- Diet: Primarily arthropods, small invertebrates, and occasionally small fish.
- Nest Type: An "oven" made of mud with a lined inner chamber.
- Size: 19 to 20 cm in length; weight between 45 and 63 g.
- Behavior: Year-round resident that often sings in pairs.
Taxonomy and Systematics
The classification of the Pacific hornero is a subject of ongoing debate among ornithologists. Currently, the International Ornithological Committee (IOC), BirdLife International, and the Clements taxonomy treat it as a monotypic species (a species with no subspecies).
Conversely, the South American Classification Committee (SACC) of the American Ornithological Society views it as a subspecies of the pale-legged hornero (F. leucopus). While the SACC acknowledges that the Pacific hornero may deserve its own species rank, they have declined to make the official split due to a lack of sufficient published data.
Physical Description
The Pacific hornero is a medium-sized bird characterized by a long, slightly decurved (downward-curving) bill. Both males and females share the same plumage, making them indistinguishable by sight. Their appearance is defined by a bright orange-rufous back, rump, and wing coverts, complemented by a chestnut-colored tail.
Detailed markings include a wide whitish supercilium (the stripe of feathers above the eye), a narrow brownish-gray stripe passing through the eye, and tawny ear coverts. Their underparts are a pale cinnamon-buff, while the throat remains white. The bird's iris ranges from yellow to whitish, and its legs and feet are a pale brownish-gray.
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Distribution and Habitat
This species is distributed from the Nariño Department in southwestern Colombia, through western Ecuador, and into the Ancash Department of northwestern Peru. Interestingly, the species was first recorded in Colombia in 2012 and appears to be expanding its range further north.
The Pacific hornero thrives in semi-open to open landscapes, primarily in lowlands. Its preferred habitats include:
- Gallery forests: Woodlands and forests located along riverbanks.
- Secondary forest edges.
- Agricultural lands.
- Urban parks and gardens.
While it generally prefers areas of moderate humidity near water, it avoids extreme arid or overly humid environments. Most populations live below 1,500 m (4,900 ft), though some in Ecuador's Loja Province reach elevations of 2,300 m (7,500 ft) within the subtropical zone.
Behavior and Ecology
Movement and Diet
The Pacific hornero is a non-migratory, year-round resident. Its diet consists mainly of arthropods (invertebrates with jointed legs), as well as snails. During the end of the dry season, there are records of the birds catching small fish in shallow pools.
When foraging, they typically work alone or in pairs, walking on the ground and turning over leaves to probe for prey.
Breeding and Nesting
The breeding season occurs at least between January and April. True to the "ovenbird" name, the Pacific hornero constructs a nest made of mud, featuring an inner chamber lined with dry plant material. These nests are built collaboratively by the pair and are typically placed on tree branches or man-made horizontal structures, such as utility pole crossbars. A typical clutch consists of two to three eggs.
Vocalization
These birds are highly vocal. Their song is a fast, piercing series of loud notes that gradually drops in pitch and slows down. Pairs are known to sing in unison, and they also utilize a loud, clear "kyeek" call.
Conservation Status
The IUCN classifies the Pacific hornero as Least Concern. The species maintains a fairly large range and is believed to have an increasing population. It has benefited from moderate human alteration of the landscape, successfully extending its range into deforested areas. Currently, no immediate threats to the species have been identified, and it is found in several protected areas.
| Feature | Details |
|---|---|
| Scientific Name | Furnarius cinnamomeus |
| Length | 19–20 cm |
| Weight | 45–63 g |
| Primary Habitat | Lowland semi-open landscapes, gallery forests |
| Diet | Arthropods, snails, small fish |
| Conservation Status | Least Concern |
Frequently Asked Questions
Is the Pacific hornero a separate species?
It depends on the authority. The IOC and BirdLife International treat it as a monotypic species, while the SACC considers it a subspecies of the pale-legged hornero due to insufficient published data to justify a split.
What is unique about the Pacific hornero's nest?
The nest is an "oven" constructed from mud with an interior chamber lined with dry plant matter, often built on branches or utility poles.
Where can the Pacific hornero be found?
It is native to southwestern Colombia, western Ecuador, and northwestern Peru, primarily in lowland areas below 1,500 meters.
What do Pacific horneros eat?
Their diet primarily consists of various arthropods and small invertebrates like snails, though they may occasionally eat small fish during the dry season.
Is the Pacific hornero endangered?
No, it is listed as Least Concern by the IUCN. Its population is believed to be increasing, partly because it adapts well to deforested and human-altered habitats.