Feral pigs are opportunistic omnivores, with about 85–90% of their diet being plant matter, and the remainder animal. Plants have difficulties regenerating from their wallowing, as North American flora did not evolve to withstand the destruction caused by rooting pigs, unlike European or Asian flora. Feral pigs in the US eat small animals, mostly invertebrates like insects and worms but also vertebrates such as wild turkey poults, toads, tortoises, and the eggs of reptiles and birds. This can deprive other wildlife that normally would feed upon these important food sources.