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Research at St Andrews

Programmable, miniature video-loggers for deployment on wild birds and other wildlife

Research output: Contribution to journalArticlepeer-review

DOI

Abstract

(1) Animal-borne miniature video cameras hold the potential to revolutionise field ornithological research, with their ability to collect detailed behavioural data from a bird's eye view, in places and contexts where conventional observation techniques would fail. (2) Here, we describe the development of a new generation of solid-state video-loggers that are cheap, light-weight, programmable and easy to use and that overcome many problems associated with earlier transmission-based technologies. (3) Our loggers weigh c. 12·3–13·6 g fully packaged for deployment and record up to 94 min of video footage, at 640 × 480 pixels and 19·7 frames per second, on a 4-GB micro-SD card. Loggers are fitted with a custom-designed, microprocessor-controlled timer that enables flexible duty-cycling, switching the unit on and off following a preprogrammed schedule. Packaged loggers contain a miniature very high frequency (VHF) radio-tag (battery life c. 5–9 weeks) for positional tracking of the bird before, during and after scheduled video shoots, and to enable logger recovery for data download. (4) To make our loggers suitable for deployment on wild birds, we developed novel techniques: (i) for the light-weight packaging of electronics (thin sheets produced from thermoplastic) and (ii) for the attachment of units to, and their controlled release from, subjects (UV-sensitive, rapidly degrading rubber tubing). Loggers can be manufactured at comparatively low cost (components are c. 94 GBP, plus c. 145 GBP for the VHF radio-tag) and are easily refurbished after recovery, making the technology suitable for large-scale deployments and projects on modest research budgets. (5) A study in 2009/2010, with logger deployments on 19 wild New Caledonian crows Corvus moneduloides, demonstrated that our new technology is field-worthy and that it can generate rich data sets on the foraging behaviour, habitat use and social interactions of an elusive bird species. (6) The young field of wildlife video-tracking is maturing quickly, and in only a few years, technology has advanced sufficiently to enable cost-effective, hypothesis-driven field studies of terrestrial birds, mammals and reptiles. Large-scale deployment of video-loggers can generate data sets of unprecedented information content, promising major quantitative insights in basic and applied ecology.

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Details

Original languageEnglish
Pages (from-to)114-122
JournalMethods in Ecology and Evolution
Volume4
Issue number2
Early online date29 Nov 2012
DOIs
Publication statusPublished - 8 Feb 2013

    Research areas

  • Animal-borne video and environmental data collection system, Biologging, Biotelemetry, Habitat use, Very high frequency wildlife radio-tracking, Home range

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