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Pink-billed Lark Spizocorys conirostris Scientific name definitions

Peter Ryan
Version: 1.0 — Published March 4, 2020
Text last updated December 2, 2014

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Field Identification

12–13 cm; 12–17 g. Fairly small, compact lark with short, stout, pinkish bill. Nominate race  has broad buffy to whitish supercilium, contrasting dark eyestripe and streaked brown crown; upperparts  brown to rufous-brown with darker feather centres, plainer on rump and uppertail-coverts; upperwing-coverts dark brown with broad buffy margins, median coverts often appearing as row of dark spots on folded wing; flight-feathers dull brown with buff margins, latter broader on inner secondaries and tertials; tail dark brown, buff margins of outer feathers; throat whitish, rest of underparts rufous-buff, breastband of dark brown streaking; eyes pale brown; bill  dull pink; legs pink. Differs from S. fringillaris in bolder supercilium, warmer-coloured upperparts, less pale in outer tail, darker underparts, thicker bill. Sexes alike. Juvenile is darker above, appearing spotted owing to pale feather tips, breast with diffuse dark spots, bill duller with blackish tip. Races vary chiefly in coloration, paler and less streaked in arid W, more rufous in SE, greyer or blackish above in N: barlowi is paler than nominate, less streaked above, belly whitish; <em>damarensis</em> is paler and less streaked than previous; crypta has greyer upperparts; makawai is blackish-brown with pinkish-buff edgings above, light pinkish-chestnut below; harti resembles previous but paler, with upperparts feathers edged pale grey.

Systematics History

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

Previously hypothesized close relationship with S. sclateri refuted by molecular data, which confirm S. fringillaris and S. personata as this species’ nearest relatives (1). Geographical variation broadly clinal; several races possibly unsustainable. Birds from far S of range named as race transiens and others from NE South Africa as griseovinacea, both of which seem indistinguishable from nominate. Six subspecies recognized.

Subspecies


SUBSPECIES

Spizocorys conirostris damarensis Scientific name definitions

Distribution

N Namibia and NW Botswana; probably S Angola (2).

SUBSPECIES

Spizocorys conirostris barlowi Scientific name definitions

Distribution

S Namibia, S Botswana and NW South Africa (Northern Cape).

SUBSPECIES

Spizocorys conirostris harti Scientific name definitions

Distribution

SW Zambia (Matabele Plain).

SUBSPECIES

Spizocorys conirostris makawai Scientific name definitions

Distribution

W Zambia (Liuwa and Mutala Plains).

SUBSPECIES

Spizocorys conirostris crypta Scientific name definitions

Distribution

NE Botswana (Makgadikgadi Pan and L Dow).

SUBSPECIES

Spizocorys conirostris conirostris Scientific name definitions

Distribution

South Africa (Northwest Province E to Mpumalanga and W KwaZulu-Natal, S to Free State and Eastern Cape) and NW Lesotho.

Distribution

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.

Habitat

Ranges from moist submontane grassland to semi-arid Nama Karoo and Kalahari grassland and savanna. In E occupies pastures and fields with young cereal crops, as well as recently ploughed and fallow fields. Largely restricted to red sands in the Kalahari, where prefers well-grassed dunes but also occurs in Rhigozum scrub provided that sufficient cover present. Often found around pans or on floodplains with short grass in N Botswana and SW Zambia.

Movement

Nomadic in arid W, following rain events with other granivorous species. Largely resident or subject to local movements elsewhere in range. Localized population in NE assumed to be entirely sedentary.

Diet and Foraging

Mostly seeds, some insects. Forages on the ground, singly or in pairs; in small flocks outside breeding season. Walks with bent legs, inspects ground surface. Regularly drinks water.

Sounds and Vocal Behavior

Flight call  a dry, trilled “chree chree”, higher-pitched than that of Calandrella cinerea; male song a mix of call notes and short, sweeter, whistled elements, often repeating each note 3–4 times.

Breeding

Mostly Nov–Jun, in association with summer rains, generally later in NW (where onset of rains delayed); in arid W breeding opportunistic, linked to rainfall, can take place at any time of year. Monogamous; nests solitarily, when conditions favourable also in loose aggregations. Male has fairly short aerial display. Nest a shallow scrape in soft, sandy soil, usually at base of a grass tuft, occasionally of another plant, lined with cup of grass and rootlets, sometimes built on foundation of sticks, in bare sandy areas open side typically with broad “apron” of nest material; usually facing S or E, but some nests in winter are in exposed sites. Clutch 2 eggs, rarely 3 (mean 2·1); incubation starts immediately after first egg laid, lasts 11–13 days, usually 12 days; chicks fed by both parents, leave nest at c. 10 days, before able to fly. In the Kalahari, crude breeding success was 15% (48% of eggs hatched, 31% of chicks fledged).
Not globally threatened. Locally common in S, becoming more sporadic in N. Non-breeding flocks small. Lives in transformed habitats as well as natural ones.
Distribution of the Pink-billed Lark - Range Map
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Distribution of the Pink-billed Lark

Recommended Citation

Ryan, P. (2020). Pink-billed Lark (Spizocorys conirostris), 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.piblar1.01
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