Which mammal lays eggs?

The correct answer is Duck-billed Platypus.

Key Points

• The Duck-billed Platypus is one of the very few mammals known to lay eggs, a characteristic that sets it apart from most other mammals.
• Platypuses are monotremes, a unique subclass of mammals that includes only two species: the Platypus and Echidna.
• Female Platypuses typically lay 1-3 eggs and incubate them by curling their body around the eggs for warmth.
• The young hatch from the eggs in about 10 days and are fed by the mother’s milk, which is secreted through specialized mammary gland patches.
• Platypuses are native to Australia and are found in freshwater rivers and lakes in eastern regions of the continent.

Additional Information

• Monotremes: Monotremes are egg-laying mammals that include only the Platypus and Echidna. They are characterized by having both mammalian and reptilian traits.
• Unique Anatomy: Platypuses have a distinctive duck-like bill, webbed feet, and a tail resembling that of a beaver. The bill is highly sensitive and helps in detecting prey underwater.
• Venomous Spur: Male Platypuses possess venomous spurs on their hind legs, which can deliver a painful sting to predators or rivals during mating season.
• Conservation Status: Platypuses are classified as "Near Threatened" by the IUCN due to habitat loss and environmental changes affecting their populations.
• Milk Secretion: Unlike most mammals, Platypuses do not have nipples; their milk is secreted through specialized skin patches, and the young lap it up directly from the mother’s skin.