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Providing evidence to improve practice

Individual study: Effectiveness of treatment with methiocarb at reducing carrion crow Corvus corone predation of little tern Sterna albifrons eggs at Santo André Lagoon Nature Reserve, Setúbal, Portugal

Published source details

Catry T. & Granadeiro J.P. (2006) Failure of methiocarb to produce conditioned taste aversion in carrion crows consuming little tern eggs. Waterbirds, 29, 211-214


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use aversive conditioning to reduce nest predation by avian predators Bird Conservation

A controlled before-and-after study in a least tern Sterna albifrons colony in west Portugal (Catry & Granadeiro 2006)  found that 15 artificial nests containing methiocarb (an illness-inducing chemical) treated quails’ eggs were predated by carrion crows Corvus corone at the same rate as 15 artificial nests containing untreated quails’ eggs. During pre-treatment (no eggs treated), first treatment phase (six days with treated eggs in experimental nests and untreated eggs in control nests) and second treatment phase (a further eight days of treatment) all eggs were destroyed within 24 hours of placement, although many treated eggs were not consumed following removal.