What is the ruling on acquiring and selling preserved (taxidermied) animals and birds? And does the ruling differ between what is permissible to acquire while alive and what is not? And what is the role of the Muhtasib regarding this phenomenon?

Collecting taxidermied birds and animals - whether those whose live possession is forbidden or those whose live possession is permissible - involves squandering money, extravagance, and waste, all of which have been prohibited. Furthermore, this is a means to acquire and display images of animate beings, which is forbidden. Therefore, it is not permissible to sell or possess them.