Pigs root in fallen logs hunting for food, including insects and small animals.
Rotten logs are a good food source for pigs, which eat both plant and animal-based food (are omniverous). Pigs will eat the invertebrates and other small animals that find good habitat in logs.
Matt Downer who took this photo followed pig tracks along a logging road to a skid site near the Tantragee Saddle behind Nelson, where there was much rooting sign, indicating the pigs returned quite often.
Photograph: by Matt Downer