Birds have one of the most evolved and complex behavioral systems of any animal group. This is due to the extra dynamics birds face living in the skies in comparison to terrestrial animals. Birds need to keep a high metabolism, with higher body temperatures than most terrestrial animals, to upkeep their insatiably high activity rates. Birds also need to keep their feathers in the utmost perfect conditions to ensure that their are no problems during flight. If a bird has damaged wing feathers and attempts to fly, it can cost them their lives.
However during my travels I have observed quite interesting and less obvious behaviors of birds, which often left me scratching my head with confusion until I researched it a bit. The first odd and memorable behavior I witnessed was that from a Double-eyed Fig-parrot (Cyclopsitta ) I was taking photos of at Gordonvale just south of Cairns.
At first I though this fig-parrot was eating something growing on the branch of this rainforest tree. I thought it was most likely the lichen. But even from the limited knowledge I knew of Double-eyed Fig-parrots, I knew this could not be the case. Fig-parrots like other parrots, are mainly granivores, meaning they mostly eat seeds.
As I went through the photos it became apparent that the parrot was chewing on the wooden structures of the branch and not actually consuming anything. This is actually a behavior that most bird keepers would know well. In captivity, bird keepers are required to include a cuddle-bone shell for their bird to sharpen their beak on. Wild birds however do not have access to a cuddle-bone and prefer to sharpen their beaks on branches.
This behavior I observed of the Double-eyed Fig-parrots is completely normal for wild birds and not as bizarre as I initially suspected. This parrot was prepping his beak ready to crack some rainforest plant seed shells. Which rainforest plant seed does this parrot species prefer? Figs ofcourse! This is where the Double-eyed Fig-parrot gets its common name from.
There is one other explanation of this behavior, which is more exciting! Fig parrots actually chew holes in trees to make their nests. Instead of waiting for fungi and termites to erode away a tree hollow they take it upon themselves to masterfully excavate their own tree hollow. This fig parrot could have been testing the branch to find dampened weak spots to dig a tree hollow in.
Based of the fact this parrot was gnawing on on both the branch and the twig jutting out from the branch, I’d say we were observing the first behavior. It’s still exciting to decipher and ponder this rarely seen behavior in wild birds!
To find out the next strange behavior I encountered, follow the link at the end of this post.