In stark contrast to the thousands of kilometres flown by certain migrating birds, such as the Arctic tern (Sterna paradisaea), the world’s shortest migration is that of North America’s blue grouse (Dendragapus obscurus).
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Although he has spent around 25 of his 33 years in Taiwan, under the
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The rate of population growth is the rate of natural increase combined with the
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Different species obey different internal and external signals that cue their migration. Animals find
In the middle half of the nineteenth century, more than one-half of the population