Cocoa Tussock Moth (Orgyia postica)

Latin Name	Observation Date	Location
Orgyia postica	May 14, 2026	Purulia, Natore, Bangladesh

Nature is truly diverse. On the afternoon of May 14, I went to my garden. Suddenly, my attention fell on my favorite tree, the Kool. I saw someone eating the young leaves and making them look rough. As I got closer, I saw a beautiful but at the same time terrifying caterpillar on the leaf. I caught it while eating the leaves.

Seeing its bright color and strange structure, I immediately took out my phone from my pocket and took several macro photos.

Later, when I compared the photos on the iNaturalist app, I found out some great information about it. Today, I thought I would share that information with you.

Name and identity:
According to the app information, the common English name of this insect is Cocoa Tussock Moth or Hevea Tussock Moth. In zoology, its scientific name is Orgyia postica. It is basically a larva or caterpillar belonging to the genus Orgyia.

​Physical structure:
Just by looking at the picture, you will understand how strange its structure is. It has four small bright yellow brush-like parts on its back. Its head is reddish and long white and black hairs are spread all over its body. Although it looks beautiful, these hairs are its biggest weapon.

​Habitat and habitat:
These insects are originally native to the tropical regions of our Asian continent. They are found in abundance in Bangladesh, India, Sri Lanka, Myanmar, Taiwan and surrounding countries. They usually love to live in orchards, croplands and forests.
​Diet and life cycle
They are completely herbivorous and extremely gluttonous! Starting from beans, guava, mangoes and almost any young leaf in the garden, they are their favorite food. They grow quickly by eating a lot of leaves and eventually create a cocoon around themselves. After a few days, they break the cocoon and emerge as moths or nocturnal butterflies.

Benefits:
Although they are not directly beneficial to humans, they are of great importance in nature's vast food chain. When they fly as full-fledged moths, they play a huge role in pollinating various wild flowers at night. In addition, many types of birds and predatory insects survive by eating them.

Disadvantages and precautions:
For those of us who do farming or gardening, this is a nightmare. When they attack trees, they eat young leaves and weaken the tree completely.
And the biggest danger is those beautiful hairs on their body. These are poisonous (Urticating hairs). When these hairs come into contact with human skin, they cause severe allergies, severe itching, rashes and swelling. So, if you see them while working in the garden, you should never touch or catch them with your bare hands.

​All in all, although the insect is harmful to the plants, its beauty is really worth enjoying through the camera lens. But yes, of course, maintaining a safe distance. Do you see such a strange insect in your garden too? You can tell us in the comments.

I learned about them from various sites including iNaturalist, Wikipedia and Google.

(All posts are written in Bengali and translated into English using Google Translate.)
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Camera Used	Samsung SM-G973F
F-Stop	F2.4
ISO speed	ISO
Focal length	26mm
Flash	No
Editing app	MIX
Photography	Cocoa Tussock Moth (Orgyia postica)
Photographer	@mshbd
Location	Purulia, Natore, Bangladesh

Link to original community
https://www.inaturalist.org/observations/361762912

Latitude	Longitude	Map Link
24.3360	89.1134	https://www.openstreetmap.org/?#map=12/24.3360/89.1134