The cormorants (or shags, which are similar) are avid fish eaters and excellent swimmers.
Dozens of eider ducks, cormorants and guillemots have all been found with contaminated plumage.
Two double-crested cormorants soar into view, their long-necked silhouettes gliding toward the Midtown skyline.
Black cormorants and giant egrets circled overhead while sneaky crocodiles lurked underwater, eager to snag their catch for the day.
There is also a wealth of birdlife under these enormous skies, such as ibises, herons, cormorants, egrets and owls.
Fish-gobbling birds such as cormorants often range over hundreds of miles, she said.
But most of the species affected - guillemots, razorbills, gannets, cormorants, and some wading birds - have fairly stable populations.
Guided boat trips can be picked up in Celestun, and immediately, kingfishers, cormorants, hummingbirds and pelicans can be spotted on all sides.
As our guide, Li Fu Xuan, explained, three local families had raised the cormorants, training them for months to retrieve but not eat the fish.
Years earlier on another trip to Asia, I saw cormorants whose owners had put wire collars around their necks to prevent them from swallowing their prizes.
It is the sea birds that are at greatest risk - pelicans, boobies, cormorants - and in fact anything that rests on or dives into the sea to feed.
The peninsula is a haven for wildlife: humpback whales in the crystal blue water, elephant seals beached on Pleneau Island, squawking adelie, chinstrap and gentoo penguins, and wheeling cormorants, petrels and terns.
More than 300 white pelicans, 23 endangered wood storks, 50 other fish-eating birds (great blue herons, cormorants, ring-billed gulls, common egrets), and three bald eagles have died near the lake northwest of Orlando.
These days, both tourists and researchers flock to the islands to see giant tortoises that can live 150 years, marine iguanas that dive to find dinner, flightless cormorants, and penguins that somehow thrive near the equator.
Established in 1929 by President Hoover to protect a breeding ground for migratory birds, the sanctuary still ranks as one of the largest nesting areas in north Florida, for birds such as ibises, pelicans, egrets and double-crested cormorants.
Reports were sent in by bird watchers from across the Isle of Man and sightings included resident birds such as stonechats, robins and cormorants and winter visitors to the island such as twite, whooper swans and great northern divers.
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