Snakes mate only with their own species, being attracted by a unique musk odor. The cobra shows more family interest than other snakes, male and female often remaining together. The female king cobra is one of the few snakes known to make a nest. She scrapes leaves into a mound about one foot [30 cm] high and deposits 20 to 50 eggs in it. She then coils her body around the mound and remains there, without food, for the almost two months of incubation, the male often staying close too. Other cobras, without preparing a nest, remain near their eggs to protect them.