Lantana, the red species, although the flowers on some of them are almost pure yellow. Not sure whether to regard them as shrubs or climbers, as they tick many boxes for both. Their redeeming features are that the birds frequent them for habitat and food, however they also spread the seed. However they are declared a noxious weed species, whereas the pink lantana (as I understand) is not. The birds are welcome to the pink one, whilst efforts are being made to eliminate this species.