Small hook tyrant
| Small hook tyrant | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
_(15340988473).jpg)
Little hooked tyrant ( Agriornis murinus ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Agriornis murinus | ||||||||||||
| ( d'Orbigny & Lafresnaye , 1837) |
The little hooked tyrant ( Agriornis murinus ) or sometimes mouse tyrant is a species of bird from the family of hooked tyrants (Agriornis). This species has a large distribution area, which is limited to the countries of Bolivia , Argentina , Paraguay and Uruguay . The IUCN assesses the population as Least Concern .
features
The small hooked tyrant reaches a body length of about 17.5 centimeters and has a hook-shaped beak. The top is light smoke gray. The tips of the wing covers, the edges of the inner hand wings, the outer flags of the outer control feathers and, to a limited extent, the tips of the tail are grayish white. They also have a white eye ring and over-eye stripes , with the reins spotted in black and white. The white to whitish throat is crossed by dark stripes. The gray-brown to gray-brown-yellow breast changes into a brown-yellowish white on the belly. The flanks are tan pink. The tail appears black in flight.
distribution and habitat
They move mainly in dry scrubland with isolated trees at heights between 100 and 2000 meters. There are populations in northwest Argentina that are spread across the provinces of Catamarca , Tucumán, and La Rioja . There are other deposits in southern central Argentina, in the provinces of Neuquén , Río Negro , the southwest of Buenos Aires to the south of Santa Cruz . In winter they migrate to Bolivia as far as the Cochabamba department and, more rarely, to Gran Chaco in western Paraguay. According to decree N ° 514/001 of the Uruguayan Ministry of Livestock, Agriculture and Fish Breeding , they are found in Uruguay in the Silvestre Fauna Reserve .
behavior
Not much is known about the bird's behavior. If they move on the ground, they run relatively fast. Otherwise she likes to sit on the bushes. They emit sharp, squeaky sounds during car chases. In the breeding season in Tucumán in December, relatively large eggs were discovered.
etymology
In the first description, d'Orbigny and Lafresnaye put the species in the genus Pepoaza . For a long time they were listed in the genus of the nun tyrants ( Xolmis ) before they were finally classified in the genus Agriornis . The generic name is made up of the Latin ager for field and the ancient Greek όρνις ( ornis ) for bird . The specific epithet murinus means mouse-gray , which is why the common name Mouse-brown Shrike-tyrant is also found in English literature alongside Lesser Shrike-tyrant .
literature
- Jon Fjeldså , Niels Krabbe : Birds of the High Andes: A Manual to the Birds of the Temperate Zone of the Andes and Patagonia, South America , Zoological Museum and Apollo Books, p. 507, ISBN 978-8788757163
- Robert S. Ridgely , Guy Tudor: The Birds of South America. The Suboscine Passerines. University of Texas Press, 1994, ISBN 0292770634 , pp. 594 f.
- Allison Victor Andors, François Vuilleumier: Breeding of Agriornis murina (Aves: Tyrannidae) in Patagonia, with comments on its habitat preferences and taxonomic position , Ornitología Neotropical, 1996, pp. 109-118
- Floyd E. Hayes, Paul A. Scharf, Robert S. Ridgely: Austral bird migrants in Paraguay , Condor, Vol 96, 1994, pp 83-97
Web links
- Agriornis murinus inthe IUCN Red List of Threatened Species 2011.2. Listed by: BirdLife International, 2009. Retrieved January 10, 2012.
- BirdLife International: Species Factsheet - Lesser Shrike-tyrant ( Agriornis murinus ) . Retrieved January 10, 2012.
- Videos, photos and sound recordings for Lesser Shrike-tyrant (Agriornis murinus) in the Internet Bird Collection
- Little hooked tyrant ( Agriornis murinus ) at Avibase; Retrieved January 10, 2012.
- Agriornis murinus in the Integrated Taxonomic Information System (ITIS). Retrieved January 10, 2012.
- xeno-canto: Sound recordings - Lesser Shrike-tyrant ( Anairetes reguloides )
- Biological Library Lesser Shrike-Tyrant Agriornis murinus Pictures
- WorldBirds Lesser Shrike-Tyrant Pictures
Individual evidence
- ↑ Mangoverde Lesser Shrike-Tyrant Agriornis murina (Eng.)
- ↑ The Condor Vol 96: S 83-97 1996 Austral Bird Migrants in Paraguay (English; PDF; 1.4 MB)
- ↑ Ministerio de Ganadería, Agricultura y Pesca Nómina oficial de especies de la Fauna Silvestre (Spanish; PDF; 5.4 MB)
- ↑ Ornitología Neotropical Breeding of Agriornis murina (Aves: Tyrannidae) in Patagonia, with comments on its habitat preferences and taxonomic position (PDF; 769 kB) Original article