I realise that we are getting away from the subject heading (ie Duranta) but to follow on from gggardener's point about certain plants being poisonous to some creatures and not others. This is true of the popular street tree Melia azedarach (Indian Bead Tree, Persian Lilac, Pride of India). Its berries are toxic to all mammals except fruit bats, they love them. We used to enjoy the sight of the Egyptian Fruit Bats visiting a large tree at the side of the house after dusk until a few years ago. Sadly, they no longer do so and we can only attribute it to the general decline in their numbers on the island due to a variety of causes including habitat destruction. I have also heard that the berries make birds drunk but not have seen any intoxicated sparrows hopping erratically around the yard I can't verify this.