Two outlying colonies also exist, at Burton Bradstock and on the Isle of Portland; the cause of the colony on Portland is unknown, but has been put down to either natural colonisation or released specimens.
Two outlying colonies also exist. This is at Burton Bradstock and on the Isle of Portland. The cause of the colony on Portland is unknown. The cause of the colony on Portland has been put down to either natural colonisation. The cause of the colony on Portland has been released specimens.