It's a bit tricky in the city I live in.

If the pedestrian crossing has lights that show pictures of both cyclists and walkers, the cyclist has the right to ride across the crossing. If however, there is only a picture of a walker or a green walk sign, the cyclist has to walk across the crossing.

All this is well and good, except of course drivers can't see who should be walking / riding and treat all crossings as not applying to cyclists. So you really do have to stop and look really carefully, to make sure the cars don't begin moving through the crossing before you are across.