Oriental Honey Buzzard (Pernis ptilorhyncus) is quite common and can be seen in many part of Singapore during migratory period.I saw one in Pasir Ris last week in a windy morning. This buzzard perch quite high up on the tree. Since is quite windy, the tree sway from time to time. This buzzard must have loose her balance while trying to jump to a higher branch.
The buzzard use her feathers (primaries) to gain back the balance. I believe this has caused the feathers to wear faster.
The buzzard managed to jump to a higher branch at last.