Showing posts with label Genetics. Show all posts
Showing posts with label Genetics. Show all posts

Monday, August 25, 2008

Farewell Fluffy

Another tragedy, a very personal one, has struck the backyard, though ironically it is completely unrelated to the window collisions of the past. This summer, we have come to know a particular house finch whom we named Fluffy because of his preference to fluff his feathers at all times. Always smaller than his peers, Fluffy constantly sought the shade and seemed more suseptible to heat and distress than other birds. He would not flit away, and in fact would often sit drowsy and content near the feeders and birdbath. On several occassions, my husband was even able to fill the birdbath while Fluffy sat quietly in the shower, enjoying the wet.

This afternoon, after speaking to Fluffy and gently touching his feathers - which he permitted in his quiet way - I was forced to say goodbye to him. He'd flown up to the roof and nestled beneath the eaves of a window, again in the shade, but several minutes later he fell from the roof onto the patio. I was with him as he died, and we've taken care that no predators will benefit from his passing.

It is unfortunate that the birds we can most easily identify as individuals are also those who have the least likely odds of survival. Their charming characteristics often come from bizarre behavior, unnatural colorations, or other genetic aberrations that ultimately make them more vulnerable to predation and natural selection - Fluffy undoubtedly had such disorders that made him less able to adapt and react to his surroundings. For a few weeks, however, they bring joy and wonder to our backyards as we grow to know their personalities and observe their behavior, and it is with fondness tinged with inevitable sadness that we remember them. Farewell, Fluffy.

Monday, March 10, 2008

A Rainbow of Finches

Spring is finally edging into Utah Valley and with its return come the house finches, always the first and most ravenous guests at my backyard feeders. As of yet they're still timid, but the male finches are showing their dramatic mating plumage.

Standard coloration is a red forehead and neck with eye streaks and a wash onto the chest, but I've had both orange and yellow color variants visit in the past. Thus far this season only the standard red males and one yellow male have made appearances at the feeder, accompanied of course by the more camouflaged buff females.

There is no definitive explanation for the color variations; some ornithologists speculate that it may be due to regional separations, while others favor the idea of a dietary influence or even poor nutrition. Neither explanation seems suitable to me: both colors share the same feed and territory regularly in my backyard. My theory is that it is no more complex than the genetic hair color variations among humans: some people have red hair, others blonde. Regardless of the scientific explanation, I find the different colors to be a beautiful palette to enjoy as spring strengthens.