Large-billed Lark

The Large-billed Lark, or Southern Thick-billed Lark, known scientifically as Galerida magnirostris, is a modestly sized passerine that graces the southern African landscape. This bird, with a length of 18 cm, is characterized by its relatively short tail and a robust bill, the lower mandible of which is adorned with a yellow base. Its upperparts are a mottled brown-grey, while a striking long white supercilium stretches above its eye. A distinctive crest, typical of its genus, can be erected in moments of display or agitation. The underparts are a soft cream, boldly streaked with dark lines across the breast.

Identification Tips

To identify the Large-billed Lark, look for its heavy, bi-colored bill which sets it apart from all other African larks. The yellow base of the lower mandible is particularly noteworthy. The streaked upperparts and the long white eyebrow stripe are also key features to observe.

Habitat

The natural habitats of this species are the fynbos, karoo scrub, and mountain grasslands. However, it is also known to frequent cultivated fields and fallow agricultural lands, adapting to the changing landscapes of southern Africa.

Distribution

The Large-billed Lark is a resident breeder found predominantly in the southern regions of South Africa, extending into Lesotho and the southernmost parts of Namibia.

Behaviour

On the ground is where the Large-billed Lark constructs its nest, blending seamlessly with the earth. It is a bird that forages for seeds and insects, with a particular penchant for the latter during the breeding season.

Song & Calls

The vocalizations of the Large-billed Lark are a soft, creaking series of notes, reminiscent of a gentle "treeeeleeeeleee", a sound that carries across the open landscapes it inhabits.

Diet and Feeding

The diet of the Large-billed Lark consists of seeds and insects, with an increased intake of the latter to meet the nutritional demands of the breeding season.

Conservation status

The IUCN Red List has classified the Large-billed Lark as Least Concern, indicating that, for now, this species does not face immediate threats to its survival.

Subspecies

Three subspecies of the Large-billed Lark are recognized:

• G. m. magnirostris, found in southwestern South Africa
• G. m. sedentaria, inhabiting southwestern Namibia and western South Africa
• Orange Free State large-billed lark, G. m. harei, seen in central South Africa and Lesotho

Similar Species

The Large-billed Lark may be confused with Bradfield's lark, also referred to as the large-billed lark, or the species commonly known as the thick-billed lark (Rhamphocoris clotbey). However, the heavy, bi-colored bill of the Large-billed Lark is a distinguishing feature to aid in correct identification.