Pronghorn and Highway Fence (IMAGE) Wildlife Conservation Society Caption Pronghorn antelope coping with two of the biggest obstacles in migration: highways and fencing. In some areas, woven-wire fences form an impenetrable barrier to pronghorn. In this image, pronghorn manage to squeeze under the 4-strand barbed wire fence after crossing US 191. Credit Jeff Burrell/Wildlife Conservation Society. Usage Restrictions One-time usage only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.