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Russian Forests Hit by Caterpillar Invasion (1:03)
Watch this video about caterpillars invading Russian forests on HowStuffWorks. Local officials say up to 800 of the bugs are infesting each single tree in the affected forest areas of the far east Russian Khabarovsk region of Russia. Learn about... More »
Metamorphosis: Incomplete Metamorphosis Stages (2:02)
Nymphs represent the second stage of metamorphosis during which insects undergo a series of molts in a few weeks as they grow to adulthood.
Metamorphosis: Incomplete Metamorphosis (1:50)
A young insect that undergoes incomplete metamorphosis strongly resembles the adults.
Metamorphosis: Complete Metamorphosis (0:42)
Ants, honeybees, and butterflies undergo complete metamorphosis.
Metamorphosis: Complete Metamorphosis Stages (9:55)
The Monarch butterfly illustrates the four stages of complete metamorphosis, including egg, larva, pupa, and adult.
