sentence: explicit list these are the animals considered to be impure according to and : bat camel chameleon coney ( hyrax ) cormorant cuckow eagle ferret gier eagle glede great owl hare hawk heron kite lapwing little owl lizard mole mouse night hawk osprey ossifrage owl pelican pig raven snail stork swine tortoise vulture weasel frog reasons some scholars , especially secular ones , have conjectured that the jewish concept of '' unclean animals '' arose out of public health concerns by community leaders , since , in the conditions of the times , some of those animals are indeed more likely to cause food poisoning or transmit diseases to people who consume them .