Hazrat Ikrimah says that if a Muhrim kills a locust, he should give a piece of bread in charity.

Hazrat Ata says that (even) giving a morsel from a locust as charity will be rewarded.

A locust passed by Hazrat Ka'b, so he struck it with a whip, then caught it and cooked it. People said to him (What is this?) He said, "This happened by mistake, and for this I have made one dirham obligatory upon myself." Then he went to Hazrat Umar. Hazrat Umar said, "You people of Homs have more dirhams; one date is better than a locust."

It is narrated from Hazrat Umar in the same manner.

Hazrat Abdullah bin Umar (may Allah be pleased with both of them) narrates that for locusts, one will give a handful as food charity.

Hazrat Muhammad bin Ali (may Allah be pleased with him), Hazrat Ata, Hazrat Mujahid, and Hazrat Tawus state that if one intentionally kills a locust, an ant, or a lizard, then he should give food in charity, and if he kills it by mistake, then nothing is required of him. And Hazrat Amir and Abdur Rahman bin Al-Aswad state that whether he kills it intentionally or by mistake, giving food in charity is obligatory upon him.

16350 - ‘Amir and ‘Abd Allah ibn al-Aswad said: He must feed something, whether it was by mistake or deliberately.

It is narrated from Hazrat Abu Salamah that a person killed a locust while in the state of Ihram, so Hazrat Abdullah bin Umar (may Allah be pleased with them both) and another companion gave a ruling: one of them ordered to give dates in charity, and the other ordered to give a piece of bread in charity.

Hazrat Ibn Abbas (may Allah be pleased with both of them) was asked: What if a Muhrim hunts a locust? He replied: Giving one date in charity is better than (hunting) a locust.

Hazrat Dahhak, regarding locusts and other small creatures, says that one handful should be given as charity.