Palestine Saw-scaled Vipers hunt disadvantaged avian migrants
Authors:
- Reuven Yosef,
- Piotr Zduniak
Abstract
The selection of an ambush-cum-foraging site and proper prey are indispensable for maintaining an adequate energy intake by sit-and-wait predators to optimize survival and future fitness. This is important for snakes, where an ambush site has suitable ambience. We studied the foraging strategy of the Palestine Saw-scaled Viper (. Echis coloratus) at an avian migratory stopover site. Following initial observations, we hypothesized that vipers are able to discern the body mass of a perched bird and hunt accordingly. We implemented an experiment where vipers chose between four groups of migratory Blackcaps with different body mass. Prey choice by vipers of both age classes was not random and adults focused on Blackcaps with the lightest body mass. Juveniles displayed a variability of prey choice but selected mainly birds from the lightest categories. We concluded that Saw-scaled Vipers hunt prey based on thermal cues; juveniles practice on different prey groups prior to perfecting their foraging techniques i.e., hunting is a learned process; and that they prefer birds with the lowest body mass. The last because Blackcaps, when on migration, save energy by entering a state of deep torpor in which they sacrifice their vigilance capabilities.
- Record ID
- UAMd80c7b4cc2954bf9a92d92910f36d3fb
- Author
- Journal series
- Behavioural Processes, ISSN 0376-6357
- Issue year
- 2015
- Vol
- 120
- Pages
- 50-53
- ASJC Classification
- ; ;
- DOI
- DOI:10.1016/j.beproc.2015.08.009 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 25
- Score source
- journalList
- Score
- Publication indicators
- = 1; = 1; : 2015 = 0.647; : 2015 (2 years) = 1.318 - 2015 (5 years) =1.533
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMd80c7b4cc2954bf9a92d92910f36d3fb/
- URN
urn:amu-prod:UAMd80c7b4cc2954bf9a92d92910f36d3fb
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.