Only 3% of bird species have penises.
0
The seahorse is the only fish to have a neck.
12
Domestic pigs average a top speed of about 11 miles per hour.
182
The Basenji dog is the only dog that is not able to bark.
4
The octopus does not have a blind spot.
273
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22