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Visual acuity of budgerigars for moving targets
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- Chaib, Sandra (author)
- Lund University,Lunds universitet,Syngruppen,Forskargrupper vid Lunds universitet,Lund Vision Group,Lund University Research Groups
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- Mussoi, Juliane Gaviraghi (author)
- Lund University
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- Lind, Olle (author)
- Lund University,Lunds universitet,Syngruppen,Forskargrupper vid Lunds universitet,Lund Vision Group,Lund University Research Groups
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- (creator_code:org_t)
- 2021-09-03
- 2021
- English.
- In: Biology Open. - : The Company of Biologists. - 2046-6390. ; 10:9
- Journal article (peer-reviewed)
Abstract
Subject headings
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- For a bird, it is often vital to visually detect food items, predators, or individuals from the same flock, i.e. moving stimuli of various shapes. Yet, behavioural tests of visual spatial acuity traditionally use stationary gratings as stimuli. We have behaviourally tested the ability of budgerigars (Melopsittacus undulatus) to detect a black circular target, moving semi-randomly at 1.69 degrees s−1 against a brighter background. We found a detection threshold of 0.107±0.007 degrees of the visual field for a target size corresponding to a resolution of a grating with a spatial frequency of 4.68 cycles degree−1. This detection threshold is lower than the resolution limit for gratings but similar to the threshold for stationary single objects of the same shape. We conclude that the target acuity of budgerigars for moving single targets, just as for stationary single targets, is lower than their acuity for gratings.
Subject headings
- NATURVETENSKAP -- Biologi -- Etologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Behavioural Sciences Biology (hsv//eng)
Keyword
- Bird vision
- Dynamic acuity
- Object detection
- Target detection
- Visual resolution
Publication and Content Type
- art (subject category)
- ref (subject category)
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- Kelber, Almut
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