Birds are part of both the Avialae clade and the larger Dinosauria clade, similar to how Triceratops is in multiple clades.
Triceratops is part of two major clades on the evolutionary tree: Ceratopsidae (played for) and Dinosaurian (played five). Birds, according to current scientific understanding, are considered avian dinosaurs and belong to the clade called Avialae or Aves.
Birds evolved from theropod dinosaurs and are part of the Dinosaurian clade, specifically falling within the subgroup Avialae, which includes modern birds and their extinct relatives such as Archaeopteryx.
Therefore, birds are part of both the Avialae clade and the larger Dinosauria clade, similar to how Triceratops is in multiple clades.