South African Shelduck (Tadorna cana)

Allan, David G.

doi:10.2173/bow.soashe1.02

Cited by 1 publication

(2 citation statements)

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“…The tentative conclusion is that Grey-backed Sparrow-lark undertakes a pre-breeding primary moult during spring and mid-summer. On average, but with considerable inter-annual variation, the month with the largest average rainfall is March, in both the Nama Karoo into which our study site falls, and at Willloughy's (1971) study site in the Namib Desert (Allan et al 1997).…”

Section: Primary Moultmentioning

confidence: 77%

“…We mistnetted Grey-backed Sparrow-larks at two waterholes at a windpump (30.8988°S, 24.6626°E) on the farm New Holme, Hanover, Northern Cape, on 3, 6 and 9 September 2023 (Figures 1-4). The vegetation in the area is Grassy Karoo (Allan et al 1997). One of the waterholes was within 10 m of the concrete reservoir at the windpump, and the water consisting of the overflow, and of seepage when there was no wind.…”

Section: Methodsmentioning

confidence: 99%

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Biometrics and moult of Grey-backed Sparrow-lark Eremopterix verticalis in the Karoo, September 2023

Hatley,

Oschadleus,

Underhill

et al. 2023

Biodiv. Obs.

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The biometrics of Grey-backed Sparrow-larks Eremopterix verticalis in the handbooks are based on small samples. We summarize wing-length, tail-length and mass of a sample of 130 Grey-backed Sparrow-larks mistnetted during ringing on the farm New Holme, Hanover District, Northern Cape, South Africa, in September 2023. The habitat was Grassy Karoo with, on average, March being the month of peak annual rainfall. The sample consisted of 58 females and 72 males. We examined birds for primary moult; 5% had moulted either one or two primaries, indicating that moult was commencing in the population as a whole. This observation, set in the context of an observation made in Namibia, suggests that this species undertakes a pre-breeding moult in spring and summer, prior to breeding in late summer and autumn.

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Section: Primary Moultmentioning

confidence: 77%

Section: Methodsmentioning

confidence: 99%