A cunning dark bird
Click on the picture to see a very cool little movie.
The crow has the job of lifting a bucket with a food reward out of the tube…and all it's given to do the job is a straight piece of wire. Watch it make a hook in the wire so it can snag the handle of the bucket and lift it out.
The bird did this spontaneously. They'd been trained to select between and straight wire and a hooked wire, but when the hooked wire was missing (a male had flown off with it), she just made do with what was available. Isn't she clever?
I think there's a message here for Rana. It's a good time to use our wits.
Weir AAS, Chappell J, Kacelnik A (2002) Shaping of hooks in New Caledonian crows. Science 297:981.



Wow. That may be the best movie I have seen all year. Thanks.