Mystery #4Tier 3what a species is
How do scientists decide that two similar animals are really separate species?
A great dane and a chihuahua look nothing alike, yet they are the same species: dogs. Meanwhile two little birds can look like identical twins and turn out to be two completely different species. Looks alone clearly aren't the test. So how do scientists actually decide where one kind of animal ends and another begins?
Your guess
Two animals can look almost the same yet count as different species. What test do you think scientists use to draw the line?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.