Dirds! Birds with dog heads and dogs with bird heads.
Chicks with Steve Buscemeyes: http://chickswithstevebuscemeyes.tumblr.com/
Dog Budgie Shaming: http://www.dogshaming.com/
The Most Interesting
Man Bird in the World
Birds with Arms: http://birdswitharms.tumblr.com/
Tard (short for Tardar Sauce) the Grumpy Cat: http://knowyourmeme.com/memes/grumpy-cat
Keep Calm and Carry On: http://www.buzzfeed.com/bizzybee712/the-best-keep-calm-and-carry-on-spoof-posters-k16