Sunbirds are notorious for building nests in and under people's houses. We have had several under the house, and I always wanted to manage to get some photos of the mother feeding her young. This was taken by setting the camera to take a photo every 10 seconds in intervalometer mode, putting it on a tripod, and going away so the bird would come back and visit the nest. Only about 1 image in 40 has anything interesting in it, but it would be hard to get these in another way, and the bad ones can just be deleted.