hey baz, the one way i know how to sex birds when there is not obvious difference in appearance between the sexes to feel around their bum. If the two bones are far apart its a girl, close together its a boy as the females require the extra space so they can lay eggs. Ravens are fantastic animals, I fondly remember watching the bird show at Toronga Zoo and they brought out a raven. It's treat was tied to one end of a length of string and the other to a branch and it was dangling. The raven using its feet and beak pulled the string up and got to its treat. apparently self taught as well. They have also been known to use traffic to crack hard nuts, they drop the nuts on the pedestrian crossings at intersections, wait till the nut gets cracked and then retrieve it when the crossing light is green.
good luck with tookie, he/she is in good hands,
Andrew
smart little buggers. how often do you see them on the side of the rd?