Visual acuity in an opportunistic raptor, the chimango caracara (Milvago chimango)
(2016) In Physiology & Behavior 157. p.125-128- Abstract
- Raptors are always considered to have an extraordinary resolving power of their eyes (high visual acuity). Nevertheless, raptors differ in their diet and foraging tactics, which could lead to large differences in visual acuity. The visual acuity of an opportunist bird of prey, the Chimango caracara (Mivalgo chimango) was estimated by operant conditioning. Three birds were trained to discriminate two stimuli, a positive grey uniform pattern and a negative grating pattern stimulus. The visual acuity range from 15.08 to 39.83 cycles/degrees. When compared to other birds, they have a higher visual acuity than non-raptorial birds, but they have the lowest visual acuity found in bird of prey so far. We discuss this result in the context of the... (More)
- Raptors are always considered to have an extraordinary resolving power of their eyes (high visual acuity). Nevertheless, raptors differ in their diet and foraging tactics, which could lead to large differences in visual acuity. The visual acuity of an opportunist bird of prey, the Chimango caracara (Mivalgo chimango) was estimated by operant conditioning. Three birds were trained to discriminate two stimuli, a positive grey uniform pattern and a negative grating pattern stimulus. The visual acuity range from 15.08 to 39.83 cycles/degrees. When compared to other birds, they have a higher visual acuity than non-raptorial birds, but they have the lowest visual acuity found in bird of prey so far. We discuss this result in the context of the ecology of the bird, with special focus on it is foraging tactic. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8573071
- author
- Potier, Simon LU ; Bonadonna, Francesco ; Kelber, Almut LU and Duriez, Olivier
- organization
- publishing date
- 2016-01-25
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- operant conditioning
- in
- Physiology & Behavior
- volume
- 157
- pages
- 125 - 128
- publisher
- Elsevier
- external identifiers
-
- pmid:26821187
- scopus:84960457813
- wos:000372943000018
- pmid:26821187
- ISSN
- 1873-507X
- DOI
- 10.1016/j.physbeh.2016.01.032
- language
- English
- LU publication?
- yes
- id
- e037faff-68b6-430c-85db-b6f1588f869a (old id 8573071)
- date added to LUP
- 2016-04-01 13:49:28
- date last changed
- 2025-04-04 14:02:15
@article{e037faff-68b6-430c-85db-b6f1588f869a,
abstract = {{Raptors are always considered to have an extraordinary resolving power of their eyes (high visual acuity). Nevertheless, raptors differ in their diet and foraging tactics, which could lead to large differences in visual acuity. The visual acuity of an opportunist bird of prey, the Chimango caracara (Mivalgo chimango) was estimated by operant conditioning. Three birds were trained to discriminate two stimuli, a positive grey uniform pattern and a negative grating pattern stimulus. The visual acuity range from 15.08 to 39.83 cycles/degrees. When compared to other birds, they have a higher visual acuity than non-raptorial birds, but they have the lowest visual acuity found in bird of prey so far. We discuss this result in the context of the ecology of the bird, with special focus on it is foraging tactic.}},
author = {{Potier, Simon and Bonadonna, Francesco and Kelber, Almut and Duriez, Olivier}},
issn = {{1873-507X}},
keywords = {{operant conditioning}},
language = {{eng}},
month = {{01}},
pages = {{125--128}},
publisher = {{Elsevier}},
series = {{Physiology & Behavior}},
title = {{Visual acuity in an opportunistic raptor, the chimango caracara (Milvago chimango)}},
url = {{http://dx.doi.org/10.1016/j.physbeh.2016.01.032}},
doi = {{10.1016/j.physbeh.2016.01.032}},
volume = {{157}},
year = {{2016}},
}