- Banded Kestrel
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Banded Kestrel Falco zoniventris Scientific name definitions

Alan C. Kemp and Guy M. Kirwan
Version: 1.0 — Published March 4, 2020
Text last updated November 16, 2015

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Field Identification

25–29 cm; c. 180–240 g; wingspan 60–68 cm (1). Relatively large-headed , with longish tail and medium-short wings (1). Underparts white, streaked with brown on the throat and upper breast  , and barred with broad grey bands below  ; all grey above, becoming slightly bluer over lower back, rump and inner wings (1). Female slightly darker and marginally larger (1) than male. Eye pale yellow. Appears accipiter like in flight and at rest, but heavy bill and large head distinctive. Other resident kestrel on island, F. newtoni is smaller, slimmer and has virtually all-brown upperparts (1). Plain underparts and dark eye distinguish migrant F. concolor. Juvenile similar to female, but browner upperparts with rufous fringes, browner streaks and bars below, and more or less rufous bars on tail-sides (1). Possibly, neither sex attains full adult plumage until third year; an immature female being brown overall, with reduced facial skin that was not bright yellow, with caramel-coloured irides (2).

Systematics History

Sometimes united in subgenus Dissodectes with other grey kestrels F. ardosiaceus and F. dickinsoni; more similar to latter. Monotypic.

Subspecies

Monotypic.

Distribution

Madagascar.

Habitat

Favours forest edge and woodland up to 2000 m, including secondary forest, clearings, sisal (3), coffee and vanilla plantations (4), and even dry woodland in S and SW Madagascar. Nonetheless, degraded habitats perhaps only utilized when in close proximity to better-quality forested areas (4).

Movement

No movements recorded within its limited island habitat.

Diet and Foraging

Few data, but predominantly takes small reptiles (including Furcifer and Calumma (5) chameleons, Oplurus and Uroplatis (2) lizards and Phelsuma geckos) and large insects (Orthoptera, flying ants, beetles, termites, mantises) (5); once a snake (5); by biomass, prey calculated to be overwhelmingly lizards (95%, especially chameleons, 86%) (5). At one nest, 30 prey items consisted of six (20%) reptiles, six (20%) unidentified vertebrates and 18 (60%) unidentified items (2). Still-hunts, usually from high, exposed perch , flying fast, sometimes straight down, to seize prey from ground, trunk, or foliage within radius of 200 m, before returning to same initial perch (1). Apparent feeding association with Sickle-billed Vanga (Falculea paliata) recently noted, with two different birds observed following flocks of the vanga, head-bobbing continuously in the direction of the group, and regularly catching small invertebrates seemingly disturbed by the passage of the vangas; association perhaps strongest early and late in the day (6). Takes some airborne prey (3), apparently including insects taken directly in the bill, although the latter observations require confirmation (6). Birds also apparently taken, at least occasionally, including Sakalava Weaver (Ploceus sakalava) (3).

Sounds and Vocal Behavior

Reportedly rather quiet, but occasionally utters shrill chatter, much like that of other kestrels (1); during an apparent territorial dispute between two adults, calls  similar to both Falco newtoni and Vasa Parrot (Coracopsis nigra) were heard (6). Also a “sonar-type” call heard close to dusk, likened to an echolocation sound (6).

Breeding

Season recorded as Sept–Dec, and perhaps later (1). Recorded nesting in tree cavities, scrapes among epiphytes (e.g. Phymatodes scolopendria, Neprolepis bisserata and Asplenuim nidus) (2) on tall forest trees, e.g. Afzelia bijuga (Caesalpinioideae) and Canarium madagascariense (Burseraceae) (2), or uses old nests of Sickle-billed Vanga (Falculea paliata); no material is added (1). Suspected also of using abandoned Hamerkop (Scopus umbretta) nests, and observed visiting a Corvus-like nest in crown of Adansonia tree in SW Madagascar (6). Epiphytes rare in dry deciduous forests of W Madagascar, thus probably reliant on other situations for nesting in this region (6). Dimensions of one nest  were 15 × 10 cm (2), but another 61 cm × 51 cm × 68 cm (5). Two clutches of three off-white to pale yellowish eggs spotted pale to medium brown (2), size 38·3–42·8 mm × 31·1–33·7 mm, 25–25·5 g (2); incubation, mainly by female, 28–30 days (5); chick has off-white down, pale grey facial skin and large dark brown-black eyes (2); fledge at 26–30 days and disperse at 56 days (5). Courtship feeding observed at nest-sites. Success on Masaola Peninsula, NE Madagascar, 2·3 young/pair, based on three nesting attempts with ten eggs, of which seven eggs hatched and all seven young fledged (5). Apparently capable of breeding prior to full adulthood (2).

Not globally threatened; formerly considered Near Threatened but now Least Concern. CITES II. Locally common but habitat limited and declining through deforestation. Not more than 1000 pairs predicted as total population, but able to exist in secondary habitats in some areas. Known from several protected areas, including Réserve Naturelle Intégrale d’Andohahela and Réserve Privée de Berenty (3); high densities of this have been reported at margins of Marojejy National Park (5). Fairly common in W and S, rare in N and E, and absent from deforested central highlands. Not known to be affected by pesticide use.

Distribution of the Banded Kestrel - Range Map
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  • Migration
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Distribution of the Banded Kestrel

Recommended Citation

Kemp, A. C. and G. M. Kirwan (2020). Banded Kestrel (Falco zoniventris), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.bankes1.01
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