Generally solitary creatures, muntjacs can be extremely competitive. Males frequently fight over mates and territory, using their antlers and canine teeth, which are elongated into tusks, as weapons. Although they are diminutive in size, they are capable of inflicting serious injuries to other animals. They cannot easily defend themselves against humans, however, and are often hunted for their skins and meat. Thus, some species of muntjacs are endangered, although the Indian muntjac appears to remain relatively abundant.