Peregrines seen as an indicator of overall ecosystem health because they are found on every continent except Antarctica, feed on a wide variety of species, from bats to hummingbirds to Canada geese
LAS VEGAS — A Nevada wildlife researcher has found that not even the fastest bird on Earth can escape mercury contamination.
“Every single one of them was impacted, regardless of whether they live in wide-open desert or Lake Mead or Greenland or coastal British Columbia,” he said.More research is needed to determine how much mercury peregrine falcons can tolerate, Barnes said. But studies of other raptors suggest concentrations of between 5 and 15 parts per million can significantly reduce breeding.
At Lake Mead, favourite peregrine prey is the eared grebe, a small water bird that migrates through the area by the hundreds of thousands. Barnes called peregrines an indicator of overall ecosystem health because they are found on every continent except Antarctica and they feed on a wide variety of species, from bats to hummingbirds to Canada geese.
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