Animals have their special ways to deal with hard times in nature.
The superb fairy-wren, one kind of bright-blue bird in Australia, is one
example. This year, a ten-year study showed that this small bird has
eggs of different sizes in different kinds of weather. When the weather
is hot and dry, there is less food for young superb fairy-wrens, and they
die easily. So the mother bird will make larger eggs to help her babies
grow stronger inside before they break out of the eggs into the “hungry”
world. However, not all mother birds are able to do this trick. Only those
with at least one male child can. When the weather is “good,”
the mother will make smaller eggs, and her sons will bring
food back for their baby brothers and sisters from the eggs.
With her sons’ help, the mother can save more energy to make
larger eggs when the weather is bad. Isn’t this amazing? 【題組】25. What can we learn about superb fairy-wrens from the reading?
(A) Male birds can usually live for ten years.
(B) Baby birds grow well in hot, dry weather.
(C) Young male birds share the job of feeding the baby birds.
(D) Mother birds make smaller eggs when there is less food outside.
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