10 – Sleeping horses - https://www.quora.com/Why-do-horses-sleep-standing-up-while-many-other-species-do-not
9 – Giraffe spots - https://www.dosomething.org/facts/11-facts-about-giraffes , https://www.quora.com/Why-do-giraffes-have-spots
8 – Night crickets - http://www.governorsresidence.ohio.gov/garden/crickets.aspx
7 – Big and domestic cats - https://en.wikipedia.org/wiki/Cat , https://www.quora.com/Why-were-cats-domesticated-to-become-so-small-whereas-many-dog-species-are-still-rather-large , https://en.wikipedia.org/wiki/Big_cat
6 – Dogs live - https://www.quora.com/Why-do-dogs-have-such-short-lives
5 – Long necks - http://www.londolozi.com/cubsden/why-do-giraffes-have-long-necks/
4 – Cat memory - http://www.animalplanet.com/pets/cat-intelligence/
3 – One legged ducks - https://animalcorner.co.uk/animals/ducks/ , http://www.thenakedscientists.com/forum/index.php?topic=11674.0
2 – Bird flight - https://en.wikipedia.org/wiki/Bird_flight
1 – Animal commands - http://thebark.com/content/how-much-human-speech-do-dogs-understand