Caterpillars are one of the creatures that are very different from other creatures in the world. it is an animal or something that is created as a larval stage of a member of the insect order consisting of butterflies and moths. Caterpillars have soft bodies that can grow rapidly before moulting into butterflies or moths. They vary in size. from 1 mm to 14 cm.
Most of the caterpillar species are herbivores (folivores), but not insectivores, not even cannibals. Some eat other animal products.
Pest caterpillars are usually voracious eaters and many of them are among the most serious eaters of agricultural crops, and are notorious for the damage they cause to leaves, fruit and other agricultural produce. However, many are useful, such as various species used as a source of silk, as food for humans or animals, or for controlling plant pests.
Many animals eat caterpillars because they are rich in protein. As a result, caterpillars have developed various means of self-defense, including defense against physical conditions such as cold, hot, or dry environmental conditions.
The general appearance of the caterpillar is often terrifying: certain markings and body parts can make it appear creepy or inedible. Some types of caterpillars are poisonous or disliked by other animals because of their bright colors. Many are faintly colored and resemble the plants they eat on.
More aggressive self-defense measures are used by some caterpillars, including having spiky hair or long fine hair such as setae with a detachable tip that is irritated by remaining on the skin or mucous membranes. These hairs are called urticating bristles. This poison is one of the most powerful defense chemicals, so it can cause human bleeding and death. Most urtic hairs have effects ranging from mild irritation to dermatitis.
Caterpillars obtain poison from their host plant which enables them to eat the leaves of these poisonous plants and store them in their bodies, making them highly toxic to predators. Some caterpillars regurgitate acidic digestive juices when attacking enemies. Many papilionid larvae produce an unpleasant odor from extrudable glands called osmeteria.

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Ulat merupakan salahsatu mahluk yang sangat berbeda dengan mahluk-mahluk lain di dunia. dia merupakan hewan atau sesuatu yang tercipta sebagai tahap larva dari anggota ordo serangga yang terdiri dari kupu-kupu dan ngengat. Ulat memiliki tubuh lunak yang dapat tumbuh dengan cepat sebelum mabung menjadi kupu-kupu atau moth. Ukurannya bervariasi. mulai dari 1 mm hingga 14 cm.
Sebagian besar spesies ulat adalah herbivora (folivora), tetapi tidak pemakan serangga, bahkan kanibal. Beberapa memakan produk hewani lainnya.
Ulat hama biasanya merupakan pemakan yang rakus dan banyak dari mereka termasuk pemakan tanaman-tanaman pertanian yang paling serius, dan terkenal karena kerusakan yang ditimbulkannya pada daun, buah-buahan dan hasil pertanian lainnya. Namun demikian tidak sedikit yang berguna, seperti berbagai spesies yang digunakan sebagai sumber sutera, sebagai makanan manusia atau hewan, atau untuk pengendalian hama tanaman.
Banyak hewan makan ulat karena kaya akan protein. Akibatnya, ulat telah mengembangkan berbagai alat pertahanan diri, termasuk pertahanan terhadap kondisi fisik seperti kondisi lingkungan yang dingin, panas, atau kering.
Penampilan ulat umumnya sering kali menakutkan: tanda dan bagian tubuh tertentu dapat membuatnya tampak menyeramkan atau tidak dapat dimakan. Beberapa jenis ulat memang beracun atau tidak disukai hewan lain karena warnanya cerah. Banyak yang berwarna samar dan menyerupai tanaman tempat mereka makan.
Tindakan pertahanan diri yang lebih agresif dilakukan oleh beberapa ulat, termasuk memiliki bulu berduri atau rambut halus panjang seperti setae dengan ujung yang bisa dilepas yang akan mengiritasi dengan tetap berada di kulit atau selaput lendir. Bulu-bulu ini disebut bulu urticating. Racun ini merupakan salah satu bahan kimia pertahanan paling kuatsehingga dapat menyebabkan pendarahan pada manusia hingga kematian. Kebanyakan rambut urtik memiliki efek mulai dari iritasi ringan hingga dermatitis. Ulat memperoleh racun dari tanaman inangnya yang memungkinkan mereka memakan daun tumbuhan beracun tersebut dan menyimpannya di dalam tubuh mereka, membuatnya sangat beracun bagi predator. Beberapa ulat memuntahkan cairan pencernaan asam saat menyerang musuh. Banyak larva papilionid menghasilkan bau tak sedap dari kelenjar yang dapat diekstrusi yang disebut osmeteria.
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Fascinating and beautiful, in their special way.
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Yes, it is extremely interesting for me although I am afraid of caterpillars when caught them. Thanks for your nice words, my dear friend.
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Some of the hairy ones in Europe are not harmless, it is good to keep some distance, for not to breathe in some of their shedded poisonous hair. It’s o.k. for someone so small, soft and slow .
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No matter how beautiful and no matter how small the size, I am still afraid that I often get goosebumps until I almost faint.
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Very informative post with superb photography masterpieces!
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Thank you very much, Hien. Best wishes
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You included so many interesting facts in this short post, and your writing is very clear and concise. The photos are wonderful – they show the broad variety of forms that caterpillars have. The first one is wild! That beautiful, elegant butterfly was the perfect ending. Excellent!
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Thank you again, my dear friend. Your nice words always make me flattered. Mostly, it is difficult for me to make short but informative writing since I have to be careful not to skip important matters for the readers to know, and I am concerned about the time that the readers have for reading it.
Have a nice day, and be healthy as always.
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I know what you mean! But I would say that you succeed, and it must be even harder in s language that isn’t your native tongue.
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That is so true. Thank you my dear friend.
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