Ed De Steiguer wrote about the wild mustangs in the Ecologist

Wild mustangs are a potent symbol of pioneer spirit in the old West, writes J. Edward de Steiguer. But with few natural controls on their numbers, the population of almost 100,000 is rising by 20% a year. Now it's up to humans to control their numbers - one way or another.

Published in the Resurgence & Ecologist, 7-August 2014