Rescue workers will head back to Everglades National Park Thursday to try to save some of the dozens of pilot whales that have been stranded in shallow waters.

A total of 10 whales have died and another 41 were still stranded in the remote area of the park as of Wednesday evening.

The whales were discovered Tuesday by fishing guides near Highland Beach, which is the western boundary of Everglades National Park in Monroe County.

Park rangers responded and found six whales dead, and another four had to be euthanized, officials said. Rangers worked with NOAA Fisheries, the Florida Fish and Wildlife Conservation Commission, Marine Mammal Conservancy and Marine Animal Rescue Society to try to herd the whales into deeper waters Wednesday.

But efforts to herd the close-knit animals out of the area, which is about an hour from the nearest boat ramp, have not been successful. One reason is the animals don't want to separate.

"Once their leader is gone, or they get beached, they don't really know what to do so they'll stay together," Everglades National Park spokeswoman Linda Friar said.

The stranding is not uncommon in Florida. In 2012, more than 20 pilot whales beached themselves in Fort Pierce, and just five were rescued.