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New Zealand birds

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New Zealand is home to a number of birds that live nowhere else on Earth.

What is a bird?

Birds have feathers and most of them fly. They have hollow bones which are light. Birds have a large breastbone that holds the strong flight muscles attached to their wings.

Birds don't have teeth and they use beaks and bills for feeding. They have two legs covered with dry skin and scales just like reptiles. When they breed, birds lay eggs.

Most birds fly, have feathers, wings and light bones. Image: LEARNZ.

Dominated by birds

New Zealand has been isolated from the rest of the world for a long time. Until people and other warm-blooded mammals arrived, New Zealand was filled with insects and birds. There were no land mammals except for bats, which meant birds were left to adapt and fill the areas which in other coutries were often filled by mammals.

Flightless birds

Many New Zealand birds have evolved to live on the ground. Before humans arrived, there were no land mammals that preyed on birds. Kiwi and the other flightless birds could therefore save energy by walking instead of flying, and safely feed and nest on the forest floor.

Takahē, kākāpō, and weka are also flightless and are all endemic to New Zealand.

Like the kiwi, kākāpō developed special characteristics to help it survive, including becoming flightless. Image: LEARNZ.

Comparison of flying and flightless birds

Features of flying birds of flightless birds
Feather cross-scetion asymmetrical symmetrical
Wings longer shorter
Feathers fewer, in rows more, all over the body
Bone anchoring flight muscles (keel) well devloped greatly reduced
Breastbone rounded flat

Some people think kiwi use their beak to fight, like a sword. That would be like you head-butting someone with your nose!

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