Grasshopper
Grasshoppers eat large quantities of foliage both as adults and during their development, and can be serious pests of arid land and prairies. Pasture, grain, forage, vegetable and other crops can be affected. Grasshoppers often bask in the sun, and thrive in warm sunny conditions, so drought stimulates an increase in grasshopper populations. A single season of drought is not normally sufficient to stimulate a major population increase, but several successive dry seasons can do so, especially if the intervening winters are mild so that large numbers of nymphs survive. Although sunny weather stimulates growth, there needs to be an adequate food supply for the increasing grasshopper population. This means that although precipitation is needed to stimulate plant growth, prolonged periods of cloudy weather will slow nymphal development.
Common leopard gecko
Common leopard geckos typically feed on crickets, roaches, mealworms/superworms, and other insects. In captivity, most leopard geckos will prefer hunting food themselves. The majority of captive common leopard geckos refuse to eat dead prey. They should not be offered dead prey either, as when dried the nutritional value significantly decreases. Crickets are the most common food source to give them in captivity, as they can hunt them in their enclosure the way they would in their natural environment, though mealworms, waxworms, and dubia roaches (and, less frequently, other roach species) are also common. When food is scarce, they can rely on their ability to store excess fat in their tails. Sufficient calcium and vitamin D3 is also very important for their diet. How they obtain it in the wild is still unknown, although they likely receive this from their varied prey of moths, spiders, ants, and other insects. In captivity, it is near impossible to completely duplicate the diet they will have in the wild, so the most nutritious insects known are offered, usually dusted with a fine calcium powder with added vitamin D3 and always gut loaded by feeding. Their prey should also be dusted with a reptile multi-vitamin about every fourth feeding. Common leopard geckos will eat until they're full and live insects that are left uneaten in their tank can become troublesome for the gecko, particularly crickets which will nibble at the lizard's tail. Their keen sense of smell and sight allows them to search for food in the wild, so they will stalk their prey somewhat like an actual leopard will, moving their tail, and then striking when they are satisfied.