Western swamphen

Western swamphen
Conservation status
Not recognized (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Gruiformes
Family:	Rallidae
Genus:	Porphyrio
Species:	P. porphyrio
Binomial name
Porphyrio porphyrio (Linnaeus, 1758)
Synonyms
Porphyrio coeruleus

The western swamphen (Porphyrio porphyrio) is a "swamp hen" in the rail family Rallidae. From its French name talève sultane, it is also known as the sultana bird. This chicken-sized bird, with its large feet, bright plumage and red bill and frontal shield is easily recognisable in its native range. It formerly was considered the nominate subspecies of the purple swamphen. It is found in Iberia, France, Sardinia and North Africa to Tunisia.

Behaviour

The species makes loud, quick, bleating and hooting calls, which are hardly bird-like in tone. It is particularly noisy during the breeding season. Despite being clumsy in flight it can fly long distances, and it is a good swimmer, especially for a bird without webbed feet.

Breeding

Western swamphens are generally seasonal breeders, correlating with peak rainfall in many places, or summer in more temperate climes. The purple swamphen breeds in warm reed beds. The pattern of social behaviour tends to be monogamy.

Pairs nest in a large pad of interwoven reed flags, etc., on a mass of floating debris or amongst matted reeds slightly above water level in swamps, clumps of rushes in paddocks or long unkempt grass. Each bird can lay 3–6 speckled eggs, pale yellowish stone to reddish buff, blotched and spotted with reddish brown. The incubation period is 23–27 days, and is performed by both sexes. The precocious chicks are feathered with downy black feathers and able to leave the nest soon after hatching, but will often remain in the nest for a few days. Young chicks are fed by their parents (and group members) for between 10–14 days, after which they begin to feed themselves.

Diet and feeding

The western swamphen prefers wet areas with high rainfall, swamps, lake edges and damp pastures. The birds often live in pairs and larger communities. It clambers through the reeds, eating the tender shoots and vegetable-like matter. They have been known to eat eggs, ducklings, small fish and invertebrates such as snails. They have even been known to attack large eels, however there is no consensus amongst ornithologists if they actually eat eel. They will often use one foot to bring food to their mouth rather than eat it on the ground. Where they are not persecuted they can become tame and be readily seen in towns and cities.

Relationship with humans

Roman times

Evidence from Pliny the Elder and other sources shows that the Romans kept purple swamphens as decorative birds at large villas and expensive houses. They were regarded as noble birds and were among the few birds that Romans did not eat. A purple swamphen is depicted at the bottom of the famous garden fresco from Pompeii.

Status and conservation

The western swamphen in the Mediterranean has declined due to habitat loss, hunting and pesticide use, and requires strict protection. In Portugal the species declined greatly in the 19th and 20th centuries, but has increased more recently thanks to protection and some reintroduction schemes, although it remains rare and has a fragmented distribution.

References

• Leo, Roger (2006). 'Shorebirds in Art: Looking at history through the purple swamphen'. Sanctuary: The Journal of the Massachusetts Audubon Society, Summer 2006, 45 (4):18-19
• Taylor, Barry and Van Perlo, Ber Rails (a volume in the Helm Identification Guides series) ISBN 0-300-07758-0

External links

• Media related to at Wikimedia Commons