But when you put them on the forest floor, they just disappear. Although the terms are often used interchangeably, it's the method of delivery that distinguishes one from the other. It's held in glands that warehouse a certain volume until used. Depending on the animal and the environmental conditions, especially temperature, it can take several weeks or months to replenish the supply. In one of two ways.
Neurotoxins attack the nervous system and cause pain, paralysis, and death by heart or lung failure.
This is the method used by cobras, stonefish, black widow spiders and scorpions. Hemotoxins attack the circulatory system and body tissues, resulting in pain, swelling, and changes in the prey's blood or degeneration of organs. The venom of most rattlesnakes, vipers and some spiders attacts this way. No easy answer here. It all depends on the potency of the venom, the amount the animal injects, the animal's temperament and ability to administer the toxin, and its proximity to people.