Beak (Barnell Bohusk) is the name of a character associated with the X-Men and its spinoff the Exiles. Beak first appeared in [New] X-Men #117 and was created by Grant Morrison and Ethan van Sciver .

Born in Rotterdam, Netherlands, Beak started developing his powers at puberty; his body changed into that of a humanoid-bird form. Feeling disgusted and ashamed, Beak ran away from home and went into hiding.

After the Xavier Institute For Higher Learning publicly revealed that the school was a training ground and sanctuary for mutants, Beak traveled to the United States and enrolled there. There, the Beast helped him with his powers.

At the institute Beak fell in love with another classmate, Angel Salvadore (not to be confused with Angel). Though Angel originally started the relationship on a bet, she later fell in love with him too. They ended up having sex, and Angel became pregnant. Fearing that the X-Men would kick them out, and what their babies would be like (due to the two's different mutant physicologies; Angel's mutation is fly-related) they didnt know what to do. Luckily, the X-Men weren't angry with them and the babies turned out fine. Angel and Beak were given a small house next to the mansion to raise the babies.

Beak was also enrolled in a Special Class run by the mutant Xorn. Xorn revealed himself to be Magneto (though it was later revealed this was just an impostor) and had Beak join his Brotherhood of Evil Mutants along with the rest of the Special Class. Beak had looked up to Xorn and was happy at first, but when the Magneto imposter started marching humans into crematoriums Beak rebelled and nearly lost his life as a result. Beak later helped the X-Men fight the impostor.

Recently, Beak has become 'unhinged' from time and been made to join the time-travelling group known as the Exiles. This has caused him to be separated from Angel, who now thinks he left her. The person who gives the Exiles their missions, the Timebroker, says Beak is destined in the future to save the lives of everyone he knows.