2 animals (2 of each kind)
I've only ever read two books of the Bible (neither of which was Genesis) and even I know it isn't two of each kind - it's two of each of the unclean kinds and seven of the clean kinds.
Or the other way round
As I understand it the Bible is none too clear on what a kind is either - since according to the story there were at least two different sorts of bird (raven and dove?) sent out by Noah the birds at least weren't just represented by a pair - or heptet - of some ancestral bird.
Actually from a quick dig around in the species listing for birds in Wikipedia you might want to reconsider the comment you made in
Message 125 that kind basically means genus - just for birds two or seven of every genus is a whole boatload of animals
Never put off until tomorrow what you can put off until the day after