مناسك حج - مكارم شيرازى، ناصر - الصفحة ٩٧ - Acts that are Haraam in the State of Ihram

Article ١٦٣- Whenever Muhrim says I swear you to Allah that do not perform this act because of kindness( not because of enmity )or says that I swear you to Allah to let me do it for you then this is not Haraam and has not atonement.

٢٤- Hunting desert animals

Article ١٦٤- Hunting desert animals or slaughtering them is Haraam in the state of Ihram, also hunting of birds is Haraam in this state and there is no difference that Muhrim hunts alone or with the help of the others; also pointing and referring the animal to the hunter, or tying and keeping the animal or eating the meat of a hunted animal( although another person has hunted or Muhrim has hunted that animal before Ihram )are Haraam.

Article ١٦٥- Also, killing grasshopper is not permitted for Muhrim, therefore if he/ she is passing a way which there is grasshoppers in that, then he/ she should change his/ her way if it is possible, and if it is not he/ she should be aware not to trample them, but it has no problem in inevitable case or if it causes strong hardness and discomfort, also killing malefic animals like snake and scorpion and ferocious animals is permitted when they cause danger.