Trochilus is a genus of hummingbirds which comprises the streamertails.
Trochilus or Trochilos may also refer to:
Trochilus (mythology), a member of the Argive royal house in Greek mythology Trochilus (crocodile bird), a legendary bird, first described by Herodotus
See also Phylloscopus trochilus, the binomial name of the willow warbler.