Many things came out in black and white before they came out in color (photographs, television, and so on). This joke implies that zebras came before other animals.
This joke came to Zebra Humor after someone accessed the site through the search terms “joke what is the oldest animal in th world? the zebra i do not get it”. Zebra Humor failed this person by not having the joke and the explanation on the site already.
Referees are often called zebras because they wear stripes.
One of the most annoying things in the world to Zebra Humor is calling referees zebras since the quest for proper zebra jokes about zebras is littered with stupid referee jokes. If any stripe-wearing people are called “zebras” it should be old timey convicts because they are simply more rad than referees. Don’t believe it? Take a look at these gents below and try to say they look like less fun than referees. Referee zebra jokes are not zebra jokes…. Except this one… but only because there is a real zebra in it.