Writing in the Biological Journal of the Linnean Society, she reported that, once their quota of seven fish was filled, the birds "stubbornly refuse to move again until their neck ring is loosened.
Hon skrev i Biological Journal of the Linnean Society att så fort fåglarnas kvot med sju fiskar var uppnådd "vägrade de envist röra på sig igen innan ringen runt deras halsar lossats.