Some, such as the Sword-billed species, evolved in conjunction with tubular flowers.
Types of this kind of bird with specialized bills for feeding are the sicklebills and thornbills. They have a grooved tongue with the outer half forked, and like woodpeckers this wraps around their skulls. Like swifts and nightjars, these birds often go into torpor to save energy, and since that occurs throughout the year, it is known as noctivation. Their gorgets produce iridescence by reflecting light through microscopic discs with air bubbles inside. Some, such as the Sword-billed species, evolved in conjunction with tubular flowers. Many species have display flights utilizing their exceptional flying abilities. For 10 points, name this extremely small, colorful type of bird.
Types of this kind of bird with specialized bills for feeding are the sicklebills and thornbills.
{Hummingbirds}