Mistletoebird of Australia
Posted by BESG on 7 November 08, Friday
Contributed by willis
Mistletoebird (Dicaeum hirundinaceum) is also known as Australian Flowerpecker and Mistletoe Flowerpecker. The bird is confined to Australia, the Moluccas, Tanimbar and Aru Islands.
This flowerpecker is found wherever there are mistletoes, plants of the family Loranthaceae.
The birds help pollinate the mistletoe flowers when they visit to take the nectar and pollen from the flowers. They also take the ripe fruits (above), expertly squeezing them out of their outer case (below). The seeds, covered with a sticky layer of mucilage is swallowed, to be excreted rapidly, usually within 15 minutes or less.
Due to the stickiness of the seed, it is stuck to the bird’s cloaca, the common opening at the lower end of the digestive, excretory and reproductive systems. The bird usually aligns its body along a branch and by wiping its bottom, detached it, although it may take the bird to move away to finally detach the clinging thread.
In this way the mistletoe seed is stuck to the branch (left, photographed in Singapore), where it germinates, puts out root and a shoot. The roots bear ‘suckers’ will grow into the branch to tap the host’s nutrients. Mistletoes are semi-parasitic, as the green leaves will photosynthesise.
In Singapore, the Scarlet-backed Flowerpecker (Dicaeum cruentatum) and Olive-backed Sunbird (Cinnyris jugularis) are the two main species that are associated with the mistletoe.
The Blue-crowned Hanging Parrot (Loriculus galgulus) has also been seen collecting nectar and in the process helping to pollinate the mistletoe flowers.
Images of Mistletoebird by willis; that of mistletoe seeds by YC.
This post is a cooperative effort between www.naturepixels.org and BESG to bring the study of bird behaviour through photography to a wider audience.
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Categories: Feeding-plants
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