News Release

A new species of hummingbird?

Data from morphology, behavior, genetics and geology support recognizing Calliphlox evelynae lyrura as a new species, says UC Riverside's Christopher Clark

Peer-Reviewed Publication

University of California - Riverside

Male Inagua Lyretail

image: Male Inagua Lyretail (Calliphlox lyrura) is shown in flight. Males differ from the Bahama Woodstar in their longer. view more 

Credit: Anand Varma

RIVERSIDE, Calif. - The Bahama Woodstar is a hummingbird found in the Bahamas, and comprises two subspecies. One of these, Calliphlox evelynae evelynae, is found throughout the islands of the Bahamas, and especially in the northern islands. The other, Calliphlox evelynae lyrura ("lyrura" for lyre-tailed, referring to the forked tail of males that resembles a classical lyre harp), is found only among the southern Inaguan islands of the Bahama Archipelago.

A research team, including biologist Christopher J. Clark at the University of California, Riverside, now argues in a research paper published in this month's issue of The Auk that the two subspecies should be recognized as two distinct species.

"The two subspecies were originally described as separate species, partly on the basis of small differences in the tail feathers between them, but were then classified in 1945 as subspecies of the Bahama Woodstar," explained Clark, an assistant professor of biology. "It's time now to call these two distinct species of hummingbirds."

Both Calliphlox evelynae evelynae and Calliphlox evelynae lyrura produce mechanical sounds with their tails during courtship displays. The researchers recorded the pops and whistles produced when air runs along male tail feathers during mating display dives. They also collected field recordings of scolding calls and songs of the two subspecies. They compared beak and wing lengths. Using tissue samples, they investigated the degree to which populations of evelynae and lyrura diverged in genetics.

They found that:

  • The tail of the adult male lyrura is more strongly forked than that of evelynae
  • The sounds produced by lyrura tail feathers were significantly higher pitched than those of evelynae, as a result of different feather shapes
  • Scolding calls qualitatively differed between lyrura and evelynae
  • Male lyrura have a distinctly different song than male evelynae; male evelynae produced rambling songs while songs of the male lyrura sounded like wet squeaky shoes
  • evelynae and lyrura populations diverged genetically sometime between about 400,000 years ago and about 1 million years ago

"Our findings suggest that lyrura is best considered a full species," Clark said. "Calliphlox evelynae evelynae should keep Bahama Woodstar as its familiar name. Calliphlox evelynae lyrura could use 'Inaguan Lyretail as its familiar name."

Next Clark and colleagues will petition the American Ornithologists' Union to officially recognize the new species.

###

Clark was joined in the research by Teresa J. Feo (lead author of the research paper), Jacob M. Musser and Jacob Berv at Yale University, Conn. The research was supported by a grant to Clark from the National Science Foundation.

The University of California, Riverside is a doctoral research university, a living laboratory for groundbreaking exploration of issues critical to Inland Southern California, the state and communities around the world. Reflecting California's diverse culture, UCR's enrollment has exceeded 21,000 students. The campus opened a medical school in 2013 and has reached the heart of the Coachella Valley by way of the UCR Palm Desert Center. The campus has an annual statewide economic impact of more than $1 billion. A broadcast studio with fiber cable to the AT&T Hollywood hub is available for live or taped interviews. UCR also has ISDN for radio interviews. To learn more, call (951) UCR-NEWS.


Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.