地球上最成功的动物

地球上最成功的动物：已被描述的昆虫种类约有100万种，科学家估计实际可能达500万至1000万种。昆虫的种类比其他所有动物类群加起来还要多。为什么这么多？体型小意味着需要的食物少，繁殖快且后代多，会飞使它们能到达新的栖息地，外骨骼也非常灵活多变。

The most successful animals on Earth: there are roughly one million described insect species, and scientists estimate 5–10 million may exist. More insect species than all other animal groups combined. Why so many? Small body size means less food needed, fast reproduction with many offspring, flight allows reaching new habitats, and the exoskeleton is incredibly versatile.

学习证据 / Evidence

• 能说出昆虫是物种最丰富的动物类群，已知种类约有一百万种。
• 能至少给出两个昆虫如此成功的原因，例如体型小、繁殖快或会飞。
• 能比较昆虫与其他动物类群的多样性，说明昆虫的物种数量远多于哺乳动物或鸟类。

• State that insects are the most species-rich group of animals with about one million known species
• Give at least two reasons why insects are so successful such as small size, fast reproduction, or flight
• Compare insect diversity to another animal group, explaining that there are far more insect species than mammals or birds

评估问题 / Assessment

{{name}}是否知道地球上哪个动物类群的物种数量比其他任何类群都多，并且能解释昆虫为何如此成功？

Does {{name}} know which group of animals has more species than any other on Earth — and can they explain why insects are so incredibly successful?