Lanzarote Chiffchaff
| Lanzarote Chiffchaff | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Phylloscopus canariensis exsul | ||||||||||||
| Hartert , 1907 |
The Lanzarote Zilpzalp ( Phylloscopus canariensis Exsul ) is a potentially extinct subspecies of Canary Zilpzalps ( Phylloscopus canariensis ) from the kind of Laubsänger ( phylloscopus ). It was endemic to the northeastern Canary Island of Lanzarote . Rumors that it also appeared in Fuerteventura have never been confirmed.
features
.jpg)
At 10 cm, the Lanzarote Chiffchaff was slightly smaller than the nominate form. It also had a slightly lighter, less olive-brown upper side and a less reddish, more pale yellow underside. The under wing-coverts were a little paler yellow. The upper bill was blackish olive-brown, the lower bill dull or light olive-brown. The iris was dark brown, the feet blackish brown.
Vocalizations
The Austrian ornithologist Johann Polatzek (1838–1927), who collected the seven type specimens in December 1903, described the reputation as stretched and rougher than the Canary Chiffchaff. The voice is said to have been similar to that of the Canary Beeper ( Anthus berthelotii ) and less bright and penetrating. The “passing over the verse” was also missing.
Occurrence, habitat and way of life
The distribution area of the Lanzarote Chiffchaff was limited to the Haría Valley on Lanzarote. Here he lived in the gorse thicket in higher regions with fresh vegetation. It was an insect eater and looked for food in the undergrowth. Occasionally it caught its prey in a hovering flight .
die out
The Lanzarote Chiffchaff has never been described as common. The exact causes and the exact time of its disappearance are unclear. In 1986 a nest was discovered that was assigned to this subspecies. The Lanzarote Chiffchaff probably died out before 1986. Most likely, the transformation of its habitat into agricultural land played the most important role in its extinction.
Systematics
The Lanzarote Chiffchaff and Canary Chiffchaff were originally described as subspecies of the Chiffchaff ( Phylloscopus collybita ). On the basis of vocal differences, wing morphology and mitochondrial DNA , the Canary Chiffchaff received species status in 1996 and the Lanzarote Chiffchaff was classified as its subspecies.
All warbler species were originally considered to be representatives of the warbler-like (Sylviidae). However, based on molecular analyzes, the new family Phylloscopidae was established in 2006 for the genera Phylloscopus and Seicercus .
literature
- Michael Walters & Julian Pender Hume: Extinct Birds . Poiser Monographes (A & C Black), 2012. ISBN 978-140-815-725-1 : p. 255
Individual evidence
- ↑ Hartert, Ernst: The birds of the Palearctic fauna - systematic overview of the birds occurring in Europe, North Asia and the Mediterranean region Volume 1. Verlag von R. Friedländer and Son, Berlin 1910. P. 505
- ^ Simms, Eric (1985). British Warblers (New Naturalist Series) . Collins. Pp. 286, 310. ISBN 0-00-219810-X .
- ↑ Clement, Peter (1995). The Chiffchaff . London: Hamlyn. ISBN 0-600-57978-6 .
- ↑ Helbig, AJ, J. Martens, I. Seibold, F. Henning, B. Schottler and M. Wink: Phylogeny and species limits in the Palearctic Chiffchaff Phylloscopus collybita complex: mitochondrial genetic differentiation and bioacoustic evidence. Ibis 138 (4), 1996: pp. 650-666.
- ↑ Alström, Per; Ericson, Per GP; Olsson, Urban & Sundberg, Per (2006): Phylogeny and classification of the avian superfamily Sylvioidea. In: Molecular Phylogenetics and Evolution 38 (2): p. 381-397. doi : 10.1016 / j.ympev.2005.05.015 PMID 16054402