Un-welcomed visitor - A predator bird

Recently there was a predator bird (hawk) came around the bird house during late afternoons when swiftlets return to play. Swiftlets don't seem to be perturbed by its presence, even with roving eagles at times!

The hawk stood on the roof's edge, changed a few spots while sizing up the situation and finally positioned itself over the entrance hole. That is a blind spot to swiftlets flying out. It leap and swoop down on them. Well so far, no birds were caught in my presence.

What is interesting was each time the hawk leap into flight, swiftlets in the air gang up and gave chase for 100 - 200m till it flew far enough away. Witnessed this behavior many times - seem they have a colonial spirit and are protective of its territory.

Predator bird (circled) flew with swiftlets (not quite visible) in hot pursuits..













Well, the long term solution is to electrify the roof's edge.