- Title
- Iris colour changes and behaviour in the Three-streaked Tchagra Tchagra jamesi: an observation from the past
- Creator
- Craig, Adrian J F K
- Subject
- To be catalogued
- Date
- 2021
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/449851
- Identifier
- vital:74857
- Identifier
- https://www.ajol.info/index.php/scopus/article/view/211291
- Description
- The African bush-shrikes (Malaconotidae) are one of the bird families in which a significant number of species have a distinctively coloured iris (Craig and Hulley 2004). However, in this review paper we overlooked both the description of the Threestreaked Tchagra Tchagra jamesi in two standard handbooks (Archer and Godman 1961, Pearson 2000), and some published observations by a well-known East African ornithologist, VGL van Someren. Changes in pupil size, or in iris coloration, seem to be close-range signals which are not often obvious to a human spectator—they are presumably directed at conspecific birds who are likely to be less than 1 m away. Some instances have thus been reported by bird-ringers with the bird in the hand (eg, Black-bellied Starling Notopholia corusca, McCulloch 1963, Britton and Britton 1970). However, keen observers and especially photographers may be alert to such subtle changes in appearance.
- Format
- 2 pages, pdf
- Language
- English
- Relation
- Scopus: Journal of East African Ornithology, Craig, A.J., 2021. Iris colour changes and behaviour in the Three-streaked Tchagra Tchagra jamesi: an observation from the past. Scopus: Journal of East African Ornithology, 41(2), pp.38-39, Scopus: Journal of East African Ornithology volume 41 number 2 38 39 2021
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Scopus: Journal of East African Ornithology Statement (https://www.ajol.info/index.php/scopus)
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Collections
Craig, Adrian JFK (Prof)
SDG 15. Life On Land
RU Department of Zoology and Entomology
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
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