Method of navigating an unmanned vehicle comprises the steps of: detecting an animal (104, 106), determining whether a current course of the unmanned vehicle will lead to a collision with the animal (112). If this is the case, the method continues by: determining at least a first priority parameter from a set of priority parameters, wherein the first priority parameter is a standing condition of the detected animal (118), deciding, on the basis of the set of priority parameters, whether the course of the unmanned vehicle will be adjusted to avoid the animal, wherein the course will be maintained (108) if the set of priority parameters meets a predetermined collision criterion, and the course will be adjusted to avoid the animal (114) if the set of priority parameters does not meet the predetermined collision criterion, wherein the set of priority parameters only meets the collision criterion if at least the standing condition is that the animal is standing.
