The long lost relatives of the club-winged manakin
As Kim continued researching the Pipra, all the puzzle pieces seemed to fall into place. She had collected information about the birds' anatomy, plumage, songs, and behavior, and all supported the idea that the club-winged manakin and Pipra are close relatives. The hypothesis just made sense to Kim at least. Her advisor, on the other hand, thought she was wrong. His anatomical studies (which he'd done during his own graduate work) suggested that the club-winged manakin occupied its own basal branch of the manakin phylogeny and was only distantly related to other manakins. But, as Kim puts it, "In science, there's no underestimating having looked at some system more carefully than everybody else. This is an investment that every investigator makes. You should expect to have new insights sometimes even if you are young. You don't have to be anointed by the academy to discover something new." And Kim was convinced that she had.
Since the club-winged manakin seemed to be closely related to the Pipra species, Kim hoped that untangling its evolutionary path would be a bit easier. If a complex feature evolves in a group at the same time that the group undergoes lineage-splitting, there is a chance that some of the stages of the evolution of the feature will be preserved in lineages that branched off from one another at different points in time. Perhaps knowing more about the sounds and behaviors of Pipra species would allow Kim to map components of these traits on the phylogeny and reconstruct key ancestral states of the club-winged manakin's evolutionary history.
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Photo of Shannon Hackett by John Weinstein (GN90809_37d) courtesy of The Field Museum, Chicago
Understanding Evolution © 2015 by The University of California Museum of Paleontology, Berkeley, and the Regents of the University of California