biologist keylor cordero is sounding the alarm.ientists counted 109,000 turtles nesting on the island. in 2021, there were only 44,000, a decline of more than half. keylor: there are important hunting areas in los cayos miskitos, in the caribbean areas of colombia and venezuela, where between 8000 and 12,000 turtles are hunted each year on the nicaraguan side. reporter: in some areas, eating turtle meat is part of indigenous culture. hunting is still allowed there. tourists are only allowed on the beach if they're accompanied by a local guide. they all have to wear dark clothing so that they don't disturb the turtles. we accompany the park rangers during their nightly inspection. the number of tourists per group is limited. there's a fine if the rules are ignored. reporter: local tourism is well organized. but monitoring the area is challenging. jeffry: in tortuguero national park, 18 people are responsible for more than 50,000 hectares of marine area, more than 26,000 hectares of land, and 30 kilometers of beach front. it's just n