The facial elephant beetle belongs to the family Tenebrionidae, order Tenebrionidae, and is a bisexual insect. Native to North America, introduced from the Soviet Union to China for breeding in the 1950s, the dried yellow mealworm contains 30% fat and over 50% protein. In addition, it also contains major elements such as phosphorus, potassium, iron, sodium, aluminum, and various trace elements. Due to the fact that dried larvae contain about 40% protein, pupae contain 57%, and adults contain 60%, it is known as the "treasure trove of protein feed". The flour beetle is a beetle that grows in large numbers in flour and grains. Red and mixed grain thieves (named after their frequent confusion with red grain thieves) can grow to less than 0.25 inches (6 millimeters) in length. The flour weevil can reproduce rapidly and consume a large amount of flour every year. Some types of larvae are called meal worms and are used to feed pet birds and fish.