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Providing evidence to improve practice

Individual study: Rodent control increases survival of artificial O’ahu ‘elapaio Chasiempis sandwichensis ibidis nests on O’ahu, Hawaii, USA

Published source details

VanderWerf E.A. (2001) Rodent Control Decreases Predation on Artificial Nests in O'ahu 'Elepaio habitat. Journal of Field Ornithology, 72, 448-457

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Control mammalian predators on islands for songbirds Bird Conservation

A before-and-after study on O’ahu, Hawaii, USA, in 1998 (VanderWerf 2001), found that predation rates on artificial O’ahu ‘elepaio Chasiempis sandwichensis ibidis nests were significantly lower following intensive rodent control compared to before control began.  There was a 55% reduction in predation rate for 40 nests placed on the ground and a 45% reduction for 40 nests placed in trees. Egg survival rates over 15 days were approximately 80% following rodent control and 20-40% before control. Survival of artificial nests in trees was not significantly different from genuine ‘elapaio nests. Control was through trapping and poisoning (with diphacinone).