“We were staying at Sabana Cove for the night. On our arrival in the morning, one of us spotted an Olive-backed Sunbird (Cinnyris jugularis) going about building, or I would say, about to complete the building of a nest.
“The first thing that we observed was that it was the female that was doing all the work. The male was just hanging around nearby observing the activities of the female.
“The video had been trimmed quite a lot to cut out the quiet periods of nothing going on at the nest. The periods between high activity ranges from one minute to five minutes. I guess this depends on the female bird being able to find what she considers as the correct material for the nest.
“The video captures the different actions of nest building: from the simple placing of a blade of grass onto the wall of the nest, the tidying up of loose pieces, to the bird getting into the nest and firming up the nest by pumping down the base with her legs to form the neat bowl and also to tighten the collection of
nesting materials. As for the ceiling of the nest, one can observe the bird using her head, by bumping upwards. This action was to again shape the ceiling to her requirement.
“From the outside the nest seems to be quite messy, but it was build like that for the purpose of camouflage, to make detection of the nest difficult. Also, the nest is secure to a very thin and flexible branch of the plant, and this again with the purpose of movement detection of any predator attempting to climb up close to the nest.”
K C Tsang
Sabana Cove, Johor, Malaysia
24th December 2010