Not far from our house, there is an old, rusting, retired bridge. When I drove by on the new bridge this Sunday, I was surprised to see that several dozen Turkey Vultures (Cathartes aura) were assembled there. Some were on the ground under the bridge, and a few were gliding above in the clear blue sky and there were even Turkey Vultures seated on fence posts along the edge of the field.
But most of the big birds were seated along the railing of the bridge. It appeared to be a Sunday Sunbathing Party. With their broad wingspan, they were an impressive sight, even from a distance. Though they paused to look my way when I stopped the car and got out, they continued undisturbed while I snapped a few photos.
Turkey vultures are carrion eaters who locate their food by scent. According to Hughes (Birds of Ontario by Janice M. Hughes, ROM and McClelland & Stewart 2001) natural gas companies have exploited their keen sense of smell by introducing an attractive (to vultures) odorant into pipelines and identifying leaks by monitoring the locations of vultures circling overhead!
Turkey Vultures are one of the few birds experiencing a rise in population numbers. Their success is attributed to the warming climate, increases in deer populations, forest clearing and more roads with higher traffic volumes providing more roadkills.
Why here? Why now? I wondered. It’s thought that vultures and other large birds sunbathe in the early morning to warm up after a cool night. It had been a cool night, but when I spotted them, it was nearly noon. They just seemed to be enjoying a pleasant get-together of the local vulture crowd, maybe having a last visit before migrating. Too anthropomorphic? Maybe, but it won’t be long before they will be heading south. I wish them a safe journey.
Willow House Chronicles 
very interesting post. it reminded me of a story i heard on NPR recently about declining vulture populations in india and the resultant problems caused because of religious rituals that surround death. it was pretty interesting. here is a link to something similar. http://www.glo-wild.com/index.php?option=com_content&view=article&id=20&Itemid=25
i am fascinated by these birds and their importance in a balanced ecosytem.
Artful, the vulture population in India crashed because the birds were poisoned. Around 2005, it was finally discovered that a veterinary drug was responsible for the massive decline. Diclofenac, used in southern Asia as a livestock treatment, is toxic to vultures when they feed on contaminated carcasses, causing kidney failure and death.
It is certainly a cautionary tale, both of the costs of careless use of drugs (or pesticides) without full consideration of all their impacts, and what happens when we disrupt an ecosystem. Thanks for the link. Very interesting.