The carcass of a 41-foot adult female gray whale landed at San Francisco’s Crissy Field on March 31. A second adult female was found April 3 at Moss Beach in San Mateo County. A third was found April 7 floating near the Berkeley Marina and the following day another at Muir Beach. A video of the fifth dead whale was posted on social media Friday.

This weekend, 50 white-fronted geese were found dead in Hvalnes in Lón and in Suðurfjörður, Fréttablaðið reports. An announcement from...

Odd Sørensen discovered this dead whooper swan on 10 April. The Norwegian Food Safety Authority has received daily reports of dead birds and are asking the public to help report bird mortality in particular with ducks, geese, swans, seagulls, eagles, buzzards, crowd and ravens.

The carcasses of four gray whales have been found around the San Francisco Bay Area in eight days -- an alarming string of deaths that constitutes an unusual mortality event, defined by the National Oceanic and Atmospheric Administration (NOAA) as a significant die-off of a marine species.

In early April I observed what appears to be widespread disease of Arbutus trees (Arbutus menziesii) on the island. Leaf blight is a known factor affecting Arbutus trees; but I wonder if other factors such as climate change may also be contributing to what is perceived as a general decline of the species.

A gray whale carcass washed ashore at Crissy Field on Wednesday morning. Veterinarians and biologists from the center and from the California Academy of Sciences plan to perform a necropsy in coming days on the island to determine the cause of death.

Knut-André Haugen found two dead swans with their heads under their wings outside Fredrikstad. Now the Norwegian Food Safety Authority suspects further spread of bird flu.

The death of birds recently discovered in Tuolporn Taley Boeung Sne protected area in Prey Veng province’s Ba Phnom district was a result of bird flu caused by influenza A virus subtype H5N1 (A/H5N1), officials confirmed. Puth Bo, community chief in the Tuolporn Taley Boeung Sne area, said community members and specialists had collected and destroyed 135 bird carcasses, raising the total to nearly 2,000 since March 17.

Nearly 30 years after an outbreak of AVM killed hundreds of eagles in Arkansas, scientists have traced the origins of the deadly disease to a previously unknown cyanobacterium.

The Coast Guard reported the dead 47-foot female humpback to NOAA on Sunday evening. It had washed ashore on the south end of Kruzof Island. The whale looked healthy and its belly was full of fish — most likely herring. But they did find some evidence of blunt trauma.

A dead humpback whale has washed ashore on North Carolina’s Outer Banks. The Charlotte Observer reported Thursday that the 18-foot whale was found on Pea Island about half-mile north of Rodanthe.

A harp seal pup sits on a snow-covered beach near the town of Blanc-Sablon, Québec, in early March. Normally harp seals give birth and raise their pups on sea ice in the Gulf of St. Lawrence, but this year’s ice coverage is at an all-time low, throwing pups’ survival into jeopardy.

A roughly 25-foot gray whale washed ashore and died Wednesday on Dockweiler State Beach south of Marina Del Rey.

Cold stress accounts for at least 39 of the deaths, or about 10%. For 277 others, almost 70%, the cause is unknown. Biologist suspect the sea cows are starving to death as the marine mammal’s main diet of seagrass wilts under ongoing years-long ecological collapse, driven by excess algae.

An Orca (Orcinus orca) carcass has been found on a beach in Port Heiden near Hook Lagoon. Sightings of these whales are a bit rare compared to many other whale carcass sightings and we just wanted to share with you this observation.

Ponderosa pines in Eastern Washington are displaying signs of irregular growth.

The animals have been decaying on the isolated stretch of sand north of Manatee Cove Park

Preliminary numbers say this was the largest cold-stunning event in recorded U.S. history.

Bird flu, or avian influenza, has struck the Swedish poultry industry hard this winter. Since November, thousands of turkeys and more than one million chickens have been culled. Malin Grant, an epidemiologist at the National Veterinary Institute, says the virus can be deadly for domestic poultry but the strains currently circulating don't easily infect or spread between people.

In Eikefjorden in Kinn municipality, large quantities of dead horse mackerel recently washed ashore. The whole thing will probably end up as a meal for birds and other fish-interested animals, the police say. The cause of the fish kill remains a mystery.