Its a bird so unfortunate to run into a kite string and get its left wing entangled. The string was there for sometimes but there is no way of getting rid of it. The top is stuck to the apartment's roof while the lower end on a tree top. I never have thought that such a string can be so lethal to flying object. Perhaps must put warning beacon on it.
The bird is still alive and struggling to break free but seems to no avail. While struggling to get free, insects starts to feast of the food that is still alive (Pic below).
I climbed on to the apartment's roof top so see whether I can cut the string loose so the bird can fall to the ground and can be freed. However there is no way to access the rooftop since there is a high wall on all four sides of the water tank and lift service room.