 The Montserrat Oriole defends territory aggressively against conspecific intruders during the breeding season.Although birds are present in territories year-round, territories appear to be less important outside the main breeding season, and the territorial response can be much reduced or completely lacking.Offspring are tolerated in territories for up to 3 months, but length of post fledging care and tolerance depends on the re-nesting decision of the territorial pair.