Systematics and Evolution
All living species are placed in the genus Gavia. Phylogenetically, the 5 living species can be arranged as follows:
Basal lineage
- Red-throated Loon or Red-throated Diver, Gavia stellata
Black-throated lineage
- Black-throated Loon, Arctic Loon, or Black-throated Diver, Gavia arctica
- Pacific Loon or Pacific Diver, Gavia pacifica (formerly in G. arctica)
Black-headed lineage
- Great Northern Loon, Common Loon, or Great Northern Diver, Gavia immer
- Yellow-billed Loon or White-billed Diver, Gavia adamsii
Read more about this topic: Loon
Famous quotes containing the word evolution:
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial “universally human images” lie dormant. Those primordial images are the most ancient, universal and “deep” thoughts of mankind. Since they embody feelings as much as thought, they are properly “thought feelings.” Where Freud postulates a mass psyche, Jung postulates a collective psyche.”
—Patrick Mullahy (b. 1912)