Cover Characteristics: Book Covers featuring Birds

I don't really have any sort of special affinity for birds, but I've noticed they seem to be on A LOT of book covers. So here we are! I've got birds that are featured prominently, birds in the background, single birds, flocks of birds, detailed birds, silhouetted birds... ok now this just sounds like a sales pitch. Anyway, here are the...
 

Cover Characteristics: Book Covers featuring Kissing

"Is this a kissing book?" Yes, child from The Princess Bride movie whose name I don't actually know, these are totally kissing books. Maybe. Actually I have no clue, but they do have kissing on the covers! The thing about book covers with kissing is, I don't have anything against them, I just don't tend to like the style of covers that feature this particular topic. Or rather, books with people...