The relationship between birds and trees on Bruny

Bruny Island
There is a dynamic relationship that builds up with particular species of trees, and particular species of birds, and their need to feed, to breed and to survive.

It is these complimentary relationships that animals and birds build up with the vegetation.

The Blue Gum produces food that is suitable for Swift Parrots when they’re flowering. And when they flower they flower profusely. So these are preferred areas where there are plenty of foods when Swift parrot chicks hatch. So the Swift Parrots feed on these blossoms. And these trees are so important - Swift parrots are in a lot of trouble because we are losing trees right across its range – feeding – breeding – you name it.

Swift Parrots on Branch Rob Blakers
Blue Gums are critical trees for Swift Parrots. Image: Rob Blakers
The honeyeaters feed on the lerps (the little insects that feed off the sugary secretion from the trees) and to some extent on the flowers.

White gums produce the most lerps, and that’s why forty-spotted pardalotes go there. The Forty-spotted pardalotes need very particular breeding spots, and they’ve disappeared a lot throughout south-eastern Australia. But not only forty-spotted pardalotes but all pardalotes are under similar threats, its just that there’s less of the forty-spots.

So for these birds to survive and thrive, we need to see and understand the need to protect the relationships between these birds and these trees.

Cover Image: Forty-Spotted Pardalote by Kim Murray

Pair of Forty Spotted Pardalotes Kim Murray
Forty-Spotted Pardalotes feed on Lerps - tiny sap-sucking insects, making White Gum an important tree for this critically endangered bird. Image: Forty-Spotted Pardalotes by Kim Murray
It is these complimentary relationships that animals and birds build up with the vegetation.

Bob Graham
Bob Graham
Bob Graham is a professional geographer and convenor of the Bruny Island Environment Network


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