#bill-size
pets Can you tell the age of a goose by the size of its bill?
The size of a goose's bill can give you an idea of its age, but it is not a definitive way to determine it. The bill of a goose grows continuously... Read more
pets Can you tell the age of a platypus by the size of its bill?
The size of the bill of a platypus changes as it grows from infancy to adulthood, but it is not a reliable indicator of age. A platypus can live up... Read more