Keystone species · explain the term

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NatureOne small aha

Your new ahaA species whose impact on its ecosystem is disproportionately large.

A keystone species has effects large relative to its abundance. Source: Keystone species ↗

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47Woodpecker's stiff tail · how it helps during climbing and peckingRECALL
Brace against a tree while climbing and pecking.
Woodpeckers combine stiff tail feathers with gripping feet and shock-absorbing anatomy.
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48A hermit crab commonly occupies this discarded hard covering for protection.RECALL
An empty shell.
Hermit crabs move into larger shells as they grow, though some species use other coverings.
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49Migration · explain the termRECALL
Regular seasonal movement between places.
Animals migrate for food, breeding, climate, or other changing conditions.
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