Like migratory birds, there are many animals which return to their birthplace to breed. Even frogs and toads migrate back to the ponds where they first grew up.
Salmon carry out long migrations to return to their birthplace. Young salmon, which hatch in small streams, travel down rivers to the sea as they develop. They spend nearly all of their adult life at sea. When it is time to breed, the salmon migrate back towards their birthplace, sometimes travelling for thousands of kilometres. They somehow manage to enter exactly same river and travel upstream to find the same tiny stream in which they hatched. Here they lay their eggs to repeat the cycle. The adult salmon die after breeding.
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