Additional file 16.

This image is of a constructed colony of decoy Northern Gannets on the North Island of New Zealand. Calls are broadcast through solar powered speakers, and the decoys were set up to try to re-establish gannets on a preserved piece of land where Northern Gannets historically were found. I took this photograph while I was participating in a large scale ecological restoration project on this property.” Attribution: Hara Woltz (Columbia University).

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Harold et al. BMC Ecology 2013 13:6   doi:10.1186/1472-6785-13-6