Burmese python mothers can generate heat while guarding their eggs; scientists documented the behaviour in a wild Florida nest

• A Burmese python guarding a clutch of eggs may appear to be doing little more than lying tightly coiled around them.
• In fact, the female can play an active role in controlling the temperature inside the nest.
• When conditions become too cool, muscles along her body begin contracting rapidly, producing heat that raises her own temperature and helps warm the eggs.