The two-headed snake belongs to identical twins, and deformed eggs are formed due to environmental factors during its development. It may also be that the gene of the snake (the part that controls the head) is unstable and prone to mutation, that is, the mutant snake. It can be preliminarily concluded that the two-headed snake belongs to identical twins, and due to the influence of environment and other factors, a deformed fetus was formed during its development. Excessive use of chemicals, pesticides, fertilizers and other environmental pollution may lead to this gene mutation.

Most two-headed snakes can only live for 5 days to 1 week because their body structure is different from that of normal species. The longest known two-headed snake: 17.