widowbird


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widowbird

(ˈwɪdəʊˌbɜːd)
n
(Animals) another name for whydah
References in periodicals archive ?
Multiple receivers, multiple ornaments, and a trade-off between agonistic and epigamic signaling in a widowbird. Am.
Agonistic carotenoid signalling in male red-collared widowbirds: aggression related to the colour signal of both the territory owner and model intruder.
While growing up, ornithologists (bird researchers) would visit her home area to study three bird species (Sharpes longclaw, the Aberdare cisticola and Jacksons widowbird) endemic to the area, but which were staring at extinction.She recounts, The researchers encouraged the locals to start sustainability projects that would benefit them as well as help to improve the number of the endangered bird species.
Female choice selects for extreme tail length in a widowbird. Nature, 299, 818-820.
Visual Traits Female preferences for long tails in long-tailed widowbirds (Euplectes progne).
This long-tailed widowbird from Africa (left) is a little bigger than a house sparrow.
Tail length affects territory ownership in the yellow-shouldered widowbird. Anim.
For instance, estimates for Jackson's widowbird Euplectes jacksoni suggest that its long tail could increase flight costs by more than 300% (Thomas 1993).
The most recent divergence of widowbird populations probably occurred during the last expansion of forests in Africa, which would have resulted in a fragmentation of the widowbirds' grassland habitat.
Female preference for long tails in lekking Jackson's widowbirds: experimental evidence.
Sexual dimorphism and modes of sexual selection in lekking Jackson's widowbirds Euplectes jacksoni (Ploceinae).
Examples of this approach involve adjusting clutch size (references above), tail length in widowbirds (Andersson 1982), or offspring size by yolk removal from eggs (Sinervo and McEdward 1988; Sinervo 1990; Sinervo and Huey 1990).