Nectarinia jugularis, Olive-backed Sunbird, Burung Madu Sriganti

Written by on November 19, 2010 in Bali Bird with 0 Comments

Nectarinia jugularis, Olive-backed Sunbird, Burung Madu Sriganti The OlivNectarinia jugularis, Olive-backed Sunbird, Burung Madu Srigantie-backed Sunbird is very bold and often builds nests close to and even in human habitation (balconies, porches, corridors). Not surprisingly then, it is among the most common Sunbirds in this region.

Sunbirds survive mainly on nectar, although they may snack on the occasional insect. Their nectar extraction equipment include: a long, slender, decurved bill with fine serration along the margins of both mandibles; and a tubular, deeply cleft tongue. Males are particularly territorial and may defend a good feeding site from other Sunbirds.

Although it is said that they cannot hover like true hummingbirds (which are found only in tropical Americas), Sunbirds can hover briefly. But they do prefer to cling to a nearby stem or vegetation as they sip nectar. They may "steal" the nectar by piercing through the base of the flower than going through the front of the flower (thus avoiding payment of pollinating services in exchange for the nectar reward).

They forage both at tree tops and among lower bushes.

Like other Sunbirds, the Olive-backed male is more colourful than the female. In fact, females of most species of Sunbirds look very similar.

Breeding: Sunbirds form monogamous pairs. The Olive-backed Sunbirds breed in April-August. They build a hanging flask-shaped nest with an overhanging porch at the entrance, and a trail of hanging material at the bottom end. Materials used include plant fibres, mosses, spider’s web. The nest is lined with soft fluffy seeds (e.g., kapok, lallang grass seeds). The outside of the nest is often untidy and decorated with lichens, dead leaves and seed cases. They usually nest low in bushes and trees, but also close to humans and even in high-rise buildings! 2 greenish-blue eggs with dark brown spots and lines are laid. Males usually don’t help in incubation, but may help out in raising the young.

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