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.

A rare pygmy sperm whale washed up at San Onofre State Beach in southern California.

"We’re way, well below what we expect to be at this point,” said Jeremy Botz, a biologist with the Alaska Department of Fish and Game. He says so far the entire commercial fleet has harvested around 6,000 sockeye, which is way below what the department anticipated

It had to be one of the strangest cases of eagle death that Danielle D'Auria has ever seen.

A sperm whale beached itself in the northwest Iceland region of Skaga, the Northwest Iceland Nature Agency reports.

Wildlife officials reported the death of a pregnant Hawaiian monk seal who was found at a beach on Kauai.

Animal discovered stranded on Tlell beach, marking first recorded sighting north of Vancouver Island

According to existing research, some kind of a toxin is responsible for triggering the death of rainbow lorikeets in Australia.