Animal excrement collection apparatus, comprising a robotic animal excrement collector 101 having a body, a propulsion system for driving the body along a ground surface, a navigation system for self-guiding the body within an environment 202 in which animal excrement is to be collected, a detection system for identifying animal excrement, a loading arrangement for picking up animal excrement, an unloading arrangement for dropping off picked up animal excrement, and a control system for controlling operations of the robotic animal excrement collector. An animal excrement collection system comprising an autonomous robotic animal excrement collector programmed to: a) navigate within an area to be cleared of animal excrement, b) pick up animal excrement 103 from a first location,and c) deliver collected animal excrement to a second location 203. A base station for use with an autonomous robotic animal excrement collector. An animal wearable sensor device for use with an autonomous robotic animal excrement collector.
