About two thirds of monocots evolved to be zoophilous (animal pollinated). The majority of monocots are animal pollinated (zoophilous), of which most are pollinator generalists. Most zoophilous monocots are pollinator generalists with the most notable exception being the Orchids. About two thirds of monocots are zoophilous, predominantly by insects. Zoophilous species include "Arctium", "Acaena", and "Galium aparine". In zoophilous (pollinated by animals) taxa, both whorls are corolline (petal-like).