Gentoo penguins are four species, not one - BBC News
Scientists are calling for a shake-up of the penguin kingdom, saying the gentoo penguin is four species, not one.
According to new evidence, the birds are slightly different in shape and size, and can be told apart by their DNA.
Counting them as separate species will help in conservation, they argue, making it easier to monitor declines.
The change would raise the tally of penguin species from 18 to 21.
Dr Jane Younger of the Milner Centre for Evolution at the University of Bath told BBC News: "Superficially, these species look very similar to each other; it's very hard to tell them apart just with your eyes.
"But if we sequence their genomes we can see very clearly that they are different. We also can tell based on different measurements."
Scientists are calling for a shake-up of the penguin kingdom, saying the gentoo penguin is four species, not one.
According to new evidence, the birds are slightly different in shape and size, and can be told apart by their DNA.
Counting them as separate species will help in conservation, they argue, making it easier to monitor declines.
The change would raise the tally of penguin species from 18 to 21.
Dr Jane Younger of the Milner Centre for Evolution at the University of Bath told BBC News: "Superficially, these species look very similar to each other; it's very hard to tell them apart just with your eyes.
"But if we sequence their genomes we can see very clearly that they are different. We also can tell based on different measurements."
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