Iris colour changes and behaviour in the Three-streaked Tchagra Tchagra jamesi: an observation from the past

Craig, Adrian J F K

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 Issued: 2021
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
Format: pdf
Language: English
Relation: Scopus: Journal of East African Ornithology
Relation: 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
Relation: 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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Craig, Adrian JFK (Prof)

RU Department of Zoology and Entomology

SDG 15. Life On Land

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