Simplify the following text for a Grade 10 native English-speaking person.
Original: The Black-headed Grosbeak , Pheucticus melanocephalus , is a medium-size seed-eating bird in the same family as the Northern Cardinal , the Cardinalidae .
Simplified: The Black-headed Grosbeak ( Pheucticus melanocephalus ) is a species of bird . It belongs in the family Cardinalidae .