Striped bobbin
| Striped bobbin | ||||||||||||
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Striped bobbin |
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| Scientific name | ||||||||||||
| Ixobrychus involucris | ||||||||||||
| ( Vieillot , 1825) |
The striped bobble ( Ixobrychus involucris ) is a species from the heron family that occurs exclusively in South America. Although it is widespread there and occurs frequently in some parts of the range, it is still considered insufficiently researched.
Appearance
The striped bobble is a very small species of heron that can grow to be between 28 and 33 centimeters tall and weigh between 73 and 104 grams. There is no noticeable gender dimorphism .
The species is predominantly sand-colored. The top of the head is black and the back is ocher and black striped. The black stripe that runs from the middle of the top of the head over the back of the head is striking. The beak is very slender and yellow-brown with a gray tip. The base of the beak is tinged with pink. The iris is pale yellow.
Distribution area and habitat
The striped bobble occurs in several disjoint sub-areas in northern and southern South America. It is a breeding bird in northern Venezuela , Guyana , Suriname , southeastern Bolivia, Paraguay, Brazil, Uruguay, and northern and central Argentina. It is also found in western Chile. The species seems to be a partial migrant, because while striped drummers are observed all year round in Chile, Brazil and Argentina, they are only represented at certain times in other parts of their distribution area.
The habitat of the striped bobbin are dense freshwater swamps and reed belts.
Way of life
The striped bobble is a solitary species that looks for food mainly at night. Their food spectrum includes small fish, crustaceans and insects, especially dragonflies, dragonfly larvae and water beetles. She moves in the reeds with great skill. If it is startled, it only flies up briefly and very quickly looks for cover in the reeds. It also assumes the stake position, which is also characteristic of bitterns and in which the neck and beak are stretched upwards.
The breeding season varies depending on the distribution area: Striped tommels breed on Trinidad from July to October; in Argentina the breeding season falls from October to December. The species nests solitary in the reed belt. The nest is 30 to 60 centimeters above the surface of the water. The clutch comprises three eggs. The incubation period is unknown.
supporting documents
Single receipts
- ↑ Kushlan et al., P. 306
literature
- James A. Kushlan & James A. Hancock: Herons . Oxford University Press, 2005, ISBN 0-19-854981-4
Web links
- Ixobrychus involucris inthe IUCN Red List of Threatened Species 2013.1. Listed by: BirdLife International, 2012. Retrieved September 21, 2013.