Iyalin Hemiprocnidae na nufin dangin tsuntsayen da aka fi sani da bishiyar swifts. Kalmar "Hemiprocnidae" ta samo asali ne daga kalmomin Helenanci "hemi," ma'ana rabi, da "prokne," wanda shine sunan jinsin gaggawa na kowa. Ana samun saurin bishiyar a cikin wurare masu zafi da na wurare masu zafi na Asiya da Afirka, kuma ana siffanta su da sassauƙan jikinsu, dogayen fukafukai, da ikon mannewa saman sama kamar kututturen bishiya. Akwai nau'i biyu ne kawai a cikin wannan iyali: Crested Treeswift da Wukar Gishiri.