Take a lot at my previous photos. When fruit is fully ripe it has some purple veins in the pulp. Also they are quite juicy when ripe. I notice the ones not fully ripe have a bit of bitterness to them. They are best when they fall into your hand, but i understand about the birds possibly getting there first. Anyway soon you will have enough for you, the birds, your friends, your neighborhood, etc. They are very productive plants!