A living animals conveying device for sorting animals with respect to a characteristic such as color, size, gender, or weight. In the case of chicks, an embodiment of the invention includes a section for conveying chicks with chicks positioned in buckets with their wings spread out, and an automatic chicks sexing system. A first endless bucket conveyor comprising pre-positioning buckets able to individually receive and transport a living animal, is oriented with respect to a second endless bucket conveyor, comprising sorting buckets able to individually receive and transport a living animal, the first conveyor and the second conveyor being arranged in such a way that each pre-positioned living animal in a pre-positioning bucket falls from the pre-positioning bucket into a sorting bucket arranged below the pre-positioning bucket.