Visual acuity of budgerigars for moving targets

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...

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Autores principales:	Sandra Chaib, Juliane Gaviraghi Mussoi, Olle Lind, Almut Kelber
Formato:	article
Lenguaje:	EN
Publicado:	The Company of Biologists 2021
Materias:	bird vision visual resolution dynamic acuity target detection object detection Science Q Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/71d4ae215e074b219a8dc8ff3ec7dfa8
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id	oai:doaj.org-article:71d4ae215e074b219a8dc8ff3ec7dfa8
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spelling	oai:doaj.org-article:71d4ae215e074b219a8dc8ff3ec7dfa82021-11-28T16:01:19ZVisual acuity of budgerigars for moving targets2046-639010.1242/bio.058796https://doaj.org/article/71d4ae215e074b219a8dc8ff3ec7dfa82021-09-01T00:00:00Zhttp://bio.biologists.org/content/10/9/bio058796https://doaj.org/toc/2046-6390For 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.Sandra ChaibJuliane Gaviraghi MussoiOlle LindAlmut KelberThe Company of Biologistsarticlebird visionvisual resolutiondynamic acuitytarget detectionobject detectionScienceQBiology (General)QH301-705.5ENBiology Open, Vol 10, Iss 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bird vision visual resolution dynamic acuity target detection object detection Science Q Biology (General) QH301-705.5
spellingShingle	bird vision visual resolution dynamic acuity target detection object detection Science Q Biology (General) QH301-705.5 Sandra Chaib Juliane Gaviraghi Mussoi Olle Lind Almut Kelber Visual acuity of budgerigars for moving targets
description	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.
format	article
author	Sandra Chaib Juliane Gaviraghi Mussoi Olle Lind Almut Kelber
author_facet	Sandra Chaib Juliane Gaviraghi Mussoi Olle Lind Almut Kelber
author_sort	Sandra Chaib
title	Visual acuity of budgerigars for moving targets
title_short	Visual acuity of budgerigars for moving targets
title_full	Visual acuity of budgerigars for moving targets
title_fullStr	Visual acuity of budgerigars for moving targets
title_full_unstemmed	Visual acuity of budgerigars for moving targets
title_sort	visual acuity of budgerigars for moving targets
publisher	The Company of Biologists
publishDate	2021
url	https://doaj.org/article/71d4ae215e074b219a8dc8ff3ec7dfa8
work_keys_str_mv	AT sandrachaib visualacuityofbudgerigarsformovingtargets AT julianegaviraghimussoi visualacuityofbudgerigarsformovingtargets AT ollelind visualacuityofbudgerigarsformovingtargets AT almutkelber visualacuityofbudgerigarsformovingtargets
_version_	1718407838236147712

Visual acuity of budgerigars for moving targets

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