migration between two groups of people, animals, etc, resulting in an exchange of habitat
intermigration in American English
(ˌintərmaiˈɡreiʃən)
noun
reciprocal migration; interchange of habitat by migrating groups
Word origin
[1670–80; inter- + migration]This word is first recorded in the period 1670–80. Other words that entered Englishat around the same time include: bonding, episode, festoon, saber, splutterinter- is a prefix occurring in loanwords from Latin, where it meant “between,” “among,”“in the midst of,” “mutually,” “reciprocally,” “together,” “during” (intercept; interest). On this model, inter- is used in the formation of compound words (intercom; interdepartmental)