How can a wild bird pull a canary out of a cage?

The poor soul was locked up in a brand new cage of good quality. I had left it on a table on the veranda for about 30 minutes (not the first time) and when I came out all is saw was feathers! The cage bars were not bent out of shape and the cage looked“untouched”, I cannot understand how the predator got the little canary out? How did that happen? Needless to say, I feel miserable, guilty, and stupid for not realizing that wild birds can attack cages even in a town! Has anyone had a similar experience?