Rescuers have been working to free an entangled female North Atlantic right whale, one of the many that have made their seasonal arrival in waters south of the Vineyard and in Cape Cod Bay to feed.

After a year of rising concern about North Atlantic right whales, scientists have yet to document a single newborn whale during calving season.

About 25 North Atlantic right whales gathered south of the Vineyard last week, marking an early-season sighting.

Three environmental organizations went to court against the federal government last week.

Dr. Mark Baumgartner will be the featured speaker for Plight of the Right Whale, an upcoming Tuesdays in the Newsroom talk held at the Gazette office on Tuesday, Jan. 23.

A decomposed whale that washed up on Chappaquiddick last month has been identified as a North Atlantic right whale, adding to the death toll.

A decomposing North Atlantic right whale was found this week on Nashawena island northwest of Martha’s Vineyard, fisheries experts confirmed.

The deaths of 13 North Atlantic right whales in the United States and Canada this year is being considered an unusual mortality event, triggering an investigation into the cause.

A decomposing North Atlantic right whale carcass recovered from the Edgartown Great Pond Tuesday morning likely died from entanglement with fishing gear, scientists said.

With three wind farms planned for south of Martha's Vineyard, the New England Aquarium has launched a yearlong study of the effects on right whales.