valerieb + JMR - the answers are in alphabetical within number of letters.
no.30 falls between swift and chukar. I have crane as the answer to no22 and marabu is out of order - hope that makes sense!
Flyfisher, that's a jolly good answer, but bearing in mind what Ternigapp's said about how the answers are arranged, I'm guessing we are looking for an 11-letter answer.
I have sparrowhawk - it was my original gut answer, but that doesn't mean anything! Just thought I'd join in. I am usually too late & others have already answered.