Rufescent imperial pigeon

Taxonomy

This species was described by Tommaso Salvadori as Carpophaga chalconota in 1874. Two subspecies are recognised: Ducula chalconota chalconota found in Vogelkop and D. c. smaragdina found in western, central and eastern New Guinea. A distinct population in the Foja Mountains has been reported.

Description

To compare, the Male Rufescent Imperial Pigeon is about 41 to 42 centimeters or about 16 to 17 inches in length. In contrast, females are smaller, about 37 to 39 centimeters or 15 inches long, and can be distinguished by slight color differences. Both weigh around 21-22 ounces. Rufescent Imperial Pigeons, both male and female, are larger than most of the other pigeon species. In the subspecies smaragdina, the head is slaty-grey. The back and wing coverts are metallic green, with bronzy and bluish reflections, and the flight feathers are darker and more bluish. The tail is blackish and has a blue gloss. The throat is cinnamon, and the breast is vinous. The belly and flanks are chestnut. The feet are red, the eye is reddish, and the beak is dark slate. The female is very similar to the male. The juvenile bird has a paler head and neck, and its breast is vaguely greyish. The subspecies chalconota has a reddish-purple iridescence on its mantle and back.

Distribution and habitat

The Rufescent Imperial Pigeon can be found in the deeper layers of the Montane Forest in New Guinea. The forest environment is the habitat to this pigeon's lifestyle because it  allows Rufescent Imperial Pigeons to be at a high elevation level of 3,600 feet tall to around 8,200 feet high. Compared to other members of the Columbidae family, this elevation is high to be a habitat. Male and female Rufescent Imperial Pigeons can be found in these forests, primarily single, but sometimes they can be found in pairs (inaturalist).

Behaviour

It often sits in the middle layers of the forest, and it does not leave the forest. Usually silent, it hums slowly and mournfully and also gives a low hoo and a hollow knock. Duetting has been observed. It eats figs and fruits. The breeding is unknown except that individuals in breeding condition have been collected in February and March.

Determining a Rufescent Imperial Pigeon is mainly done through visuals rather than vocals. This bird does not vocally express itself frequently, but when alarmed a hollow knock sound will echo through the forest. This hollow knock is known to sound like a slurred "woo". Coloring, though, is a more simplistic way to determine a rufescent imperial pigeon. Their chest is a pale-orange color that leads to a deep rufous belly and a black band in the tail. Females are distinguished by having a less reddish iridescence than males. Despite the fact that this bird is a pigeon, discovering a Rufescent Imperial Pigeon would be a very rare occurrence.

Status

The population is stable and does not have substantial threats, so the IUCN has assessed it as a least-concern species.

References

References

1. BirdLife International. (2016). "''Ducula chalconota''".
2. "Species Search · iNaturalist".
3. (2020-03-04). "Rufescent Imperial-Pigeon (Ducula chalconota)". Birds of the World.
4. (1874). "Altre nuove specie di uccelli della Nuova Guinea e di Goram raccolto dal Signor L. M. L'Albertis". Annali del Museo Civico di Storia Naturale di Genova.
5. "Pigeons".
6. (2020-03-04). "Rufescent Imperial-Pigeon (Ducula chalconota)". Birds of the World.
7. (2020-03-04). "Rufescent Imperial-Pigeon (Ducula chalconota)". Birds of the World.
8. (2010). "Pigeons and Doves: A Guide to the Pigeons and Doves of the World". A&C Black.
9. (2016). "Birds of New Guinea: Distribution, Taxonomy, and Systematics". Princeton University Press.
10. "Species Search · iNaturalist".
11. "Species Search · iNaturalist".