Celebrated on January 5th
The smallest bird egg belongs to the hummingbird and is the size of a pea. The largest bird egg, from which the ostrich hatches, is the size of a cantaloupe.
The only bird with nostrils at the end of its beak is the kiwi. This placement helps it sniff for food, such as worms and insects on the ground. It often snorts to clear its nostrils.
Hollow bones can lighten a bird’s weight to make flying easier, but that’s not the whole story. A University of Massachusetts study found that bird bones can actually weigh just as much as other animals’ bones. The difference is that bird bones have greater bone density than mammal bones, which makes them tougher. They also often have a twisted or curved shape for increased strength when pushed during flight.