It is truly remarkable the tricks that creatures of the Chocó have developed for survival: claws for burrowing, sticky tongues for licking, special holes for hiding, and even the ability to mimic bird poo. Read on to discover those strange behaviours witnessed by Mashpi guide Juan Carlos Narváez on his rounds through the forest.
By Juan Carlos Narváez
Northern naked-tailed armadillo
A few months ago, while I was walking towards the Copal waterfall with Franklin, one of our local guides, we were fortunate to bump into a northern naked-tailed armadillo, (Cabassous centralis). It feeds on ants and termites, and to hunt them it digs a hole until it reaches them, and captures them with its long and sticky tongue.
The way that it digs these holes is with its strong front paws, and it also moves its shell from side to side to help it burrow (you can see this action in Video 2). To find its food it is helped by a powerful sense of smell (video 3). This animal is solitary in its habits and mainly nocturnal, although it can also be seen during the day. A characteristic of this armadillo is that it emits a strong musk odour, something that we couldn’t establish in our meeting with this species. This rare species little-known by science is native to the Ecuadorian coast – principally in the Chocó – and is becoming threatened by the growing rate of deforestation suffered by the zone.
What would you do if you were a delicious caterpillar to hide from a hungry bird?
Try to look like something that a bird wouldn’t want to eat. Something like poo.
Some caterpillars are masters of disguise, not only able to copy the colour and texture of bird droppings, but also to contort their bodies into the shape of poo.
To test this theory, investigators used edible caterpillars made of pastry to see if the folded up shapes were less likely to be gobbled up by a bird.
The replicas were made so that they were identical to the larvae that use this form of imitation. The models were put in cherry trees, in the natural habitat of these caterpillars; some were put in the straight form (how generally most caterpillars are found in the wild), while others were folded up to look like bird droppings.
It was found that the model caterpillars that were straight were attacked three times more than the ones folded into excrement shapes. To complete the experiment, the same pastry was used to make replicas of caterpillars but in this case they were painted green, and there was no difference in the number of attacks suffered by the straight ones and folded ones. This is the first experiment that truly demonstrates that not only the colour but also the pose adopted by the caterpillars helps them to appear to be an inedible object.
In our Life Centre we can find a good example of this type of larvae, given that here is where you find butterfly larvae. With their white spots they look uncannily like bird poo. Come and visit our Life Centre to learn more, like how butterflies defend themselves from predators.
Read more here:
- Bent posture improves the protective value of bird dropping masquerading by caterpillars.
- Caterpillars contort their bodies to look like bird poop
While travelling on the Mashpi Dragonfly, you always have the opportunity to have extraordinary encounters with nature.
In this case, from one of the gondolas we were able to observe a southern tamandua (Tamandua mexicana).
This strange creature has both diurnal and nocturnal habits, and is solitary and tree-dwelling. Stocky, it has strong claws that it uses to be able to break termite and ant nests, to feed upon them. Its vision is poor, but its sense of smell is very developed and it uses it to find its grub. Its movement is slow, both on the ground and in the trees. In this case we found it resting among the moss, although it also uses hollow tree trunks for its lair. Another interesting fact is that to defend itself it stands on its hind feet and fights with its claws or tries to quickly climb a tree.