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In this video you see how the antlion make his trap, to hunt ant and small insects

Arabian sand boa (Eryx jayakari) also know as Jayakar's sand boa is a harmless boa species endemic to the deserts of the Arabian Peninsula and southern Iran. The species geographic range includes eastern Saudi Arabia, Iraq, Yemen, Oman, and Kuwait.

عنكبوت الجمل منتشر كثيرا في العراق والخليج والعربي في الصحاري والبيوت السكنية، والعديد من الناس يقتلونه ويعتقدون بانه سام ومؤذي ولكن في الحقيقة عنكبوت الجمل غير سام بتاتا بل على العكس يتغذى على العقارب والافاعي الصغيرة والحشرات الضارة ويعتبر مفيد جدا للانسان ولا يشكل اي خطر عليهم.

In this video you can see the damage due to butterflies larvae, and how are caterpillars harmful to plants. also how to get rid of caterpillars by biopesticides.
Note: read captions.

A pupa is the life stage of some insects undergoing transformation between immature and mature stages. This stage begins when the caterpillar is done growing, where the caterpillar makes a chrysalis and then turns into a butterfly.

We know that scorpions feed on cockroaches in nature, In addition many other insects, But in this video we can see the scorpion stand still and didn't try to catch the cockroach because he was afraid.

In this video, you see a challenge between the Scorpion and the camel spider, and fight to the death. The spider wins and eats the scorpion after cutting its tail.

In this video you see the scorpion feeding.
Scorpions eat a variety of insects, spiders, other scorpions and lizards. They also eat small mammals, such as mice. Scorpions must have water to drink, but they can survive for months without food.