Only female sea turtles have hatched on Florida's coasts over the past four years, according to animal experts.

Bette Zirkelbach, manager of the Turtle Hospital in Marathon, Florida, says higher temperatures are to blame for the concerning trend.

"Scientists that are studying sea turtle hatchlings and eggs have found no boy sea turtles, so only female sea turtles for the past four years," Zirkelbach told Reuters.

The discovery is not limited to Florida. Zirkelbach told the news organization that researchers in Australia have also documented similar findings, with an estimated 99% of the country's turtles born female over the past few years.