I'm a birdwatcher, which in my specific case kind of crosses the line into a mild mental illness. I've traveled all over the world to see new birds, which is kind of cool, but it's also led me to do stuff like standing calf-deep in the snow, in far-below-freezing temperatures and gale-force winds, to see a rare species of duck that happened to end up for some reason in nearby Cayuga Lake in midwinter. From the standpoint of seeing a bird species I'd never seen before, it was a great day.
It was a somewhat less-than-great day with respect to frostbite, hypothermia, and people in passing (heated) cars rolling down their windows to yell "What the hell is wrong with you?"
The reason this all comes up because of how excited I am about a recent release of new information by the Bird 10,000 Genomes Project, which has as its fairly lofty goal the sequencing of the genomes for all ten-thousand-plus species of birds currently living on the Earth.
The cool thing about genetic information to determine relationships is that it's much more accurate than relying on such obvious characteristics as external appearance or behavior. Through genetic analysis, the B10K Genomes Project, as it's affectionately known, has found the following surprises:
- Flamingos are fairly closely related to grebes, a family of small diving water birds, and both as a group are more closely related to pigeons than to any other species of aquatic bird.
- Likewise, the bizarre flightless dodos, now extinct but once common on two remote islands in the Indian Ocean, are most closely related to pigeons.
- The three main groups of birds that regularly prey on mammals -- hawks and eagles, owls, and falcons -- aren't closely related at all, and their similarities seem to have developed through convergent evolution.
- Despite superficial similarities in appearance and behavior, vultures in North and South America are only very distantly related to vultures in Africa and Europe.
- Hummingbirds, swifts, and nightjars (such as the more-often-seen-than-heard whippoorwill) are all on the same branch of the bird family tree. A different branch includes such disparate groups as loons, pelicans, albatrosses... and penguins.
- Emus, ostriches, and kiwis -- flightless species that are on the same basic branch, a group called ratites -- all descend from a common ancestor that could fly, and apparently evolved flightlessness independently.
So the study is pretty cool, expanding greatly what we know about the feathered dinosaurs we see flitting about every day. As the B10K Genome Project site puts it:
The B10K project will allow the completion of a genomic level tree of life of the entire living avian class, decode the link between genetic variation and phenotypic variation, uncover the correlation of genetic evolutionary and biogeographical and biodiversity patterns across a wide-range of species, evaluate the impact of various ecological factors and human influence on species evolution, and unveil the demographic history of an entire class of organisms... We envision this project will have significant scientific and public impact that will change our understanding of avian biology and evolution, which in turn will affect our understanding of other organisms and open doors to new areas of research.I'm really looking forward to seeing what else they uncover. It might not explain my obsession with trying to see every bird there is -- something a friend of mine calls "Pokémon for Adults" -- but it certainly will give me something new to think about when I'm shivering in the snow looking for rare ducks.