The osprey is second only to the peregrine falcon, as the most widely distributed bird of prey in the world, found on every continent but Antarctica, while picking up regional names like fish hawk, fish eagle and seahawk. There are probably half a million osprey globally, and osprey are one of the clearest indications of the health of any shallow fresh, brackish or saltwater habitat.
Like eagles, osprey are generally monogamous and tend to use the same nests year after year, so a successful osprey family indicates lots of fish, and since osprey are not as rigidly territorial as some other predators, the more osprey nests a habitat supports, the more likely the general health of the ecosystem is good.
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