User:Jordanviv02/Hummingbird/Bibliography

Humming Bird Musculo-skeletal adaptations of the syrinx to aid singing
A bird's vocal organ, the syrinx, plays an important role in understanding vocal learning in certain bird species. Hummingbirds have the ability to sing like other songbirds in the Apodiformes order, but due to the presence of different anatomical features of the hummingbird syrinx, one can observe the different adaptations at play. Hummingbird syrinx's consist of intrinsic musculature, accessory cartilages, and a large tympanum, a cartilage structure formed by the fusion of lower tracheal rings to form a tube-like structure, which are adaptations thought to be responsible for the hummingbird's increased ability in pitch control.