I wonder if anyone knows why Little Corellas are forming into the huge flocks
that cause devastation to trees.
I have experienced it a number of times over the years in both the east and
west of Australia. Last year at Millstream-Chichester NP in WA, the ranger
closed the campground when hundreds of Little Corellas descended on the
Crossing Pool campground breaking branches off the melaleucas which littered
cars, tents, tables, etc. He was afraid that someone would suffer an eye
injury.
Over the years on a farm out of Biloela, the Corellas have visited some apple
gums surrounding a waterhole where they broke off all the branches. These
trees seem to regenerate each year so it hasn't been a problem. However, this
year they have attacked a large poinciana tree on the same property and
completely denuded it to the extent where the owner is afraid it will die.
It appears they do not select one particular type of tree. They just seem to
break off the last 45 cms (18 inches) of each branch until there are no leaves
left. I would be interested to hear if anyone has any theories on the subject.
Jan
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