Kalmar "Ornithomimida" tana nufin ƙungiyar bipedal, dinosaur-kamar tsuntsaye waɗanda suka rayu a lokacin Late Cretaceous. Sunan ya fito ne daga kalmomin Helenanci "ornithos" ma'ana "tsuntsaye," da "mimos" ma'anar "mimic" ko "mime," saboda ana tunanin waɗannan dinosaur suna kama da tsuntsaye a wasu hanyoyi. Ornithomimids suna da dogayen ƙafafu masu sirara da hannaye, kuma tabbas sun kasance masu komi, suna ciyar da tsire-tsire da ƙananan dabbobi. Wasu daga cikin sanannun ornithomimids sun haɗa da Ornithomimus da Gallimimus, waɗanda galibi ana kiran su da “jiminai-mimic” saboda kamanceceniya da jiminai na zamani.