Corvid control in urban environments: A comparison of trap types

László Kövér, Norbert Tóth, S. Lengyel, Lajos Juhász

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Corvids, mainly Hooded Crows (Corvus cornix L.) and Rooks (Corvus frugilegus L.) have colonised and spread in many European cities in recent decades. They are often considered as pests due to their noise, littering, aggression to humans and pets, and predation on birds of urban environments. Consequently, the control and/or management of corvids may become necessary in many cities in the future. The aim of this study was to compare the effectiveness of different trap types in catching crows and rooks in an urban environment. We experimentally tested four types of traps in the winter of 2014: bow net, Larsen trap, Swedish trap, and ladder entrance trap. As bait, we used bread, meat, fish, and live decoy birds. In 269 trap-days, we captured 23 Hooded Crows (with three birds recaptured 10 times), 34 Rooks (three recaptured 11 times), and 3 Magpies. The side-opening Larsen trap (0.46 captures/trap-day) and the ladder entrance trap (0.37) were the most effective. We caught only juvenile Hooded Crows, and both juvenile and adult Rooks, likely related to the wariness of adult crows. If a bird was captured in one type of trap, it was never recaptured in that type of trap. Our study suggests that trapping may be an effective way to catch crows and rooks and that some trap types may be more efficient than others. We present detailed guidelines for trapping, which will be useful in environmental management, urban planning and development, nature conservation and wildlife management.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalNorth-Western Journal of Zoology
Volume14
Issue number1
Publication statusPublished - Jun 1 2018

Keywords

  • City
  • Corvus cornix
  • Corvus frugilegus
  • Hooded Crow
  • Human-wildlife conflict
  • Mark-recapture
  • Rook

ASJC Scopus subject areas

  • Animal Science and Zoology

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