Activities of foxes and crows in a flock of lambing ewes

Abstract

The feasibility of direct observations on the activities of foxes (Vulpes vulpes) in a flock of lambing ewes has been proven in a pilot trial at Minnipa in South Australia. Ewes were confined to an open six-acre paddock near fox-infested scrub, and continuous observations were made from a 'hide' on a tower in the paddock. Progress of lambs was followed by direct observation and by weighing twice a day. Foxes were readily detected by the naked eye when the moon was almost full and their activity was easily followed with the aid of binoculars. Foxes appeared unaware of the observers and were little disturbed by a spot-light. Ewes were very little disturbed by the close proximity of foxes. Most foxes approached ewes or lambs very cautiously and were easily frightened away. Foxes mainly scavenged foetal membranes and dead lambs, but one attack on a healthy lamb was witnessed. Foxes were not seen during daylight. Crows (Corvus spp.), attracted by grain feeding of the sheep, showed an appetite for foetal membranes and lamb faeces. Lambs separated from ewes were frequently attacked, but healthy lambs were not injured