Clever crows are caught on camera

"Clever crows are caught on camera"
Rebecca Morelle, 4.10.2007

Miniature cameras have given scientists a rare glimpse into how New Caledonian crows behave in the wild.

The birds are renowned for their sophisticated tool-using ability, but until now, observing them in their natural habitat has proven difficult.

But specially designed "crow-cams" fitted to the birds' tails have shed light on the creatures, recording some tool-use never seen before.

The research is reported in the journal Science. (...)
Recent advances in mobile phone technology enabled the researchers to construct a camera that was small enough to attach to a crow's tail without impairing its movements.

They attached the 14g (0.5oz) units - which also contained a radio tag to transmit location coordinates - to the tail feathers of 18 New Caledonian crows.

Przypomina mi się komentarz Bekoffa, który twierdzi, że nie ma takiego "nieinwazyjnego" sposobu obserwacji zwierząt, który jednak w jakiś sposób nie byłby inwazyjny.