The Budgerigar (Melopsittacus undulatus), commonly known as the parakeet or "budgie," is a small, colorful bird native to Australia. These birds are compact, measuring about 18 cm in length, and are known for their bright green plumage with yellow heads and black scalloped markings on their necks and backs. Budgies are social, playful birds, and their ability to mimic human speech has made them popular pets worldwide. Their vibrant colors vary widely, with selective breeding producing blues, whites, yellows, and other hues.