The budgie is a small bird. 
The budgie is a small bird from Australia. 

The budgerigar is a small parrot from Australia. 
In the wild, budgies are green and yellow. They have black marks on their wings and backs.
Budgies live in dry parts of Australia. They are nomadic, which means they move from place to place. They fly in large flocks to find food and water. They mostly eat seeds from grass.
Adult budgies can look different from each other. You can tell them apart by their cere. The cere is the part of the face that holds the nostrils. In males, the cere is often blue. In females, it can be brown or white. 
The budgerigar is a small, long-tailed parrot that lives in Australia. 
In nature, budgies are mostly green and yellow. They have black, scalloped markings on their wings and backs.
Scientists first described the budgerigar in 1805. A man named George Shaw was the first to record them. Later, in 1840, John Gould gave them their official scientific name. The name *Melopsittacus* comes from Ancient Greek. It means "melodious parrot." The second part of their name, *undulatus*, is Latin. It means "wave-patterned," which describes their beautiful feather patterns. 
Budgies are nomadic, which means they move from place to place. They live in the dry parts of Australia in grasslands or woodlands.
Budgies often live in pairs and show love to each other. They show affection by preening, which is cleaning each other's feathers. 

The budgerigar (*Melopsittacus undulatus*) is a small, long-tailed, seed-eating parrot. It is native to the dry regions of Australia. Many people know them as budgies or common parakeets. They are currently the third most popular pet in the world. This ranking follows only domesticated dogs and cats. People enjoy keeping them because they are small and can mimic human speech. 
In the wild, budgerigars have survived harsh inland conditions for over five million years. Their success comes from a nomadic lifestyle. This means they move constantly to find resources. They live in open habitats like scrublands, grasslands, and open woodlands. 
Wild budgerigars usually display a light green body color. They have black, scalloped markings on their wings and backs.
Budgerigars have a very special way of seeing the world. They possess tetrachromatic color vision. This means they can see four different classes of color. They can see into the ultraviolet spectrum. Their feathers actually fluoresce, or glow, under ultraviolet light. This helps them during courtship and mate selection. The throat spots of the birds also reflect ultraviolet light. This allows individual birds to recognize one another.
It can be difficult to tell male and female budgerigars apart when they are young. This is because juveniles are monomorphic, meaning they look the same. Adults are distinguished by their cere. The cere is the fleshy area around the nostrils. In males, the cere is typically lavender or light blue. In females, it is usually pale brownish or white. During breeding, a female's cere may turn a crusty brown color. 
History shows how humans have studied these birds for a long time. George Shaw first recorded the species in 1805. Later, in 1840, John Gould gave them their official scientific name. The genus name *Melopsittacus* comes from Ancient Greek. It means "melodious parrot." The species name *undulatus* is Latin for "wave-patterned." This refers to the scalloped patterns on their feathers. 
Budgerigars are social birds that often live in pairs. They show affection through mutual preening, which is cleaning each other's feathers. They also feed each other by regurgitating seeds. This behavior helps maintain their long-term pair-bonds. When they breed, they use holes in trees, logs, or fence posts for nests. A female typically lays between four and eight eggs. She incubates these eggs for 18 to 21 days. 
While budgerigars are successful, they face challenges. In the wild, they must deal with changing environments and food availability. In the past, a population of feral budgerigars lived near St. Petersburg, Florida. This population declined due to competition for nesting sites from other birds. They eventually died out in 2014. In captivity, breeders must watch for genetic health issues. These can include physical abnormalities or diseases passed between birds. 
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