Deathbird (Cal'syee Neramani-Summers) is a fictional character appearing in American comic books published by Marvel Comics. She is a supervillain, an adversary of the X-Men. Deathbird is part of a segment of the extraterrestrial Shi'ar race that possesses talon-tipped wings. She is the hated sister of the Shi'ar empress Lilandra Neramani, the mother of the Shi'ar warrior, Deathcry, and constantly seeks to usurp her sister's throne. She is also a sister of D'Ken, the first depicted ruler of the Shi'ar.