Pigeons. You might think they’re boring, but do you really know about them? Doves and pigeons are in the same family, the Columbidae family. Another bird in the Columbidae family is the Dodo. There are 300 types of pigeon, the most commonly known one is the Rock Pigeon, ones you may find on the streets. Many people call pigeons ‘Rats of the sky’ but those are people who don’t know how impressive these birds are. They don’t only dig for trash and poop everywhere in densely populated cities. They are actually fairly smart creatures, and beloved by many large historical figures, such as Charles Darwin and Nikola Tesla. Pigeons are very smart in their own way. While they may not be as smart as dogs or pigs, they are up there on the list. Exactly #19 0n the list, out of 8.7 million species.