U.S. Marines and civilians pose for a group photo after installing a water guzzler near the X-Ray Impact Area on Marine Corps Base Camp Pendleton, Calif., Jan. 15, 2022. Water guzzlers have been a vital part of animal conservation since the early years of Camp Pendleton. There are 19 endangered species on Camp Pendleton that rely on the water guzzlers each day in order to maintain a healthy population. - U.S. Marines and civilians pose for a group photo after installing a water guzzler near the X-Ray Impact Area on Marine Corps Base Camp Pendleton, Calif., Jan. 15, 2022. Water guzzlers have been a vital part of animal conservation since the early years of Camp Pendleton. There are 19 endangered species on Camp Pendleton that rely on the water guzzlers each day in order to maintain a healthy population.