Dark batis

The dark batis (Batis crypta) is a small passerine bird belonging to the genus Batis in the wattle-eye family, Platysteiridae. It is found in highland forest in south-west Tanzania and northern Malawi. These birds were formerly thought to be forest batises (B. mixta) but in 2006 were described as a new species based on differences in morphology and mitochondrial DNA from those birds in northern Tanzania and Kenya.

Dark batis

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Platysteiridae
Genus: Batis
Species:
B. crypta
Binomial name
Batis crypta
Fjeldså, Bowie & Kiure, 2006

Description

The dark batis is about 10 cm (3.9 in) in length and weighs 10–15 g (0.35–0.53 oz). It has a dark bill and legs and red eyes. The male is white below with a broad black breastband. Above it has a dark grey crown, grey back with some black feather-tips, a black face-mask and black wings with a white stripe. The female has a greyish crown, brownish back, dark mask, slight white supercilium and a narrow rufous stripe on the wing. Below it has a rufous chin-spot and breast with whitish tips to some of the feathers.[2]

The forest batis has a slightly shorter tail. Males of the two species are very similar but forest batises have a narrower breastband and usually some hint of a white supercilium which is lacking in the male dark batis. The females are more distinctive: female forest batises have a paler breast and chin with more white tips giving a mottled appearance. There is a conspicuous white supercilium and a broad rufous wing-stripe.[2]

The dark batis has a variety of whistling and harsh churring calls and its wings make a whirring sound in flight. The male's song is a series of short, low whistles.[2]

Distribution and habitat

It is found in the Eastern Arc Mountains of East Africa from the Ukaguru Mountains and Uluguru Mountains of central Tanzania south-westwards as far as the Misuku Hills in northernmost Malawi.[3]

It inhabits evergreen forest from 540 to 2,140 metres above sea-level and is most common around 1,500 metres. It forages mainly in the lower and middle levels of trees, feeding on insects such as termites.[4]

References
  1. BirdLife International (2012). "Batis crypta". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  2. Fjeldså, Jon; Bowie, Rauri C. K.; Kiure, Jacob (2006). "The forest batis, Batis mixta, is two species: description of a new, narrowly distributed Batis species in the Eastern Arc biodiversity hotspot" (PDF). Journal of Ornithology. 147 (4): 578–590. Archived from the original (PDF) on 2011-05-17. Retrieved 2008-02-26.
  3. "Dark Batis (Batis crypta)". Handbook of Birds of the World Alive. Lynx Edicions. Retrieved 2016-11-04.
  4. Harris, Tony; Franklin, Kim (2000). Shrikes and Bush-shrikes. Christopher Helm. pp. 300–301. ISBN 0-7136-3861-3.
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