One of These Seven Students Is Not a Girl — Can You Spot Him?

At first glance, this looks like an ordinary group photograph of seven students standing outside their school. They are all wearing what appears to be the same school uniform: white shirts, blue ties, blue plaid skirts, white socks, and black shoes.

But there is a twist hidden in the picture.

One of the seven students is not a girl. Can you figure out which one?

The image gives you seven people to examine, numbered 1 through 7,