Anomalous binocular vision in African Harrier-Hawks.
| Autor: | Portugal SJ; Department of Biological Sciences, School of Life and Environmental Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK. Electronic address: Steve.Portugal@rhul.ac.uk., Ozturk R; Department of Biological Sciences, School of Life and Environmental Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK; School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AS, UK., Murn CP; School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AS, UK; The Hawk Conservancy Trust, Sarson Lane, Weyhill, Andover, Hampshire SP11 8DY, UK., Potier S; Les Ailes de l'Urga, 72 rue de la vieille route, 27320 Marcilly la Campagne, France; Lund Vision Group, Department of Biology, Lund University, Sölvegatan 35, S-22362 Lund, Sweden., Martin GR; School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | Current biology : CB [Curr Biol] 2023 Nov 06; Vol. 33 (21), pp. R1142-R1143. |
| DOI: | 10.1016/j.cub.2023.09.016 |
| Abstrakt: | An animal's visual field is the three-dimensional space around its head from which it can extract visual information at any instant 1 . Bird visual fields vary markedly between species, and this variation is likely to be driven primarily by foraging ecology 1 , 2 , 3 . The binocular visual field is the region in which the visual fields of the two eyes overlap; thus, objects in the binocular field are imaged by both eyes simultaneously. The binocular field plays a pivotal role in the detection of symmetrical optic flow-fields, providing almost instantaneous information on the direction of travel and the time to contact a target towards which the head or feet is travelling; thus, information from the binocular field is crucial in guiding key foraging behaviours 2 , 3 . Here, we demonstrate an unusual visual field and binocular extent above the head in African Harrier-Hawks, also known as Gymnogenes (Polyboroides typus) compared to 18 other members of the Accipitridae 4 , 5 . We argue that the observed visual field can be attributed to the unusual and specific foraging behaviour of African Harrier-Hawks. (Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|