I've been meaning to do a content analysis for most popular animal among HN users, based on subject in headlines. My guess is something along this order:
1. Cats
2. Honeybees
3. Dolphins
1. Cats
2. Honeybees
3. Dolphins
6. Pigeons[0]
[0] - http://blog.flypigeon.co/our-application-to-y-combinators-w1...