Hawksbill Sea Turtle

Overview

The hawksbill sea turtle (Eretmochelys imbricata) is the most visually distinctive of the hard-shelled sea turtles: its narrow, tapering head ends in a sharp, hooked beak (the source of its common name), and its carapace has an overlapping, “imbricated” scute pattern with an amber-brown tortoiseshell coloration that made this species the target of centuries of commercial exploitation. Adults typically reach about 1 m in carapace length and weigh approximately 80 kg.

Hawksbills are the only sea turtle specialized for feeding on coral reef sponges — they wedge their narrow bill into reef crevices to extract prey most other animals cannot reach. This dietary specialization ties them directly to reef ecosystem health: as reef sponge densities shift, so does hawksbill food availability.

Why Tortuguero

Hawksbills are part of the multi-species sea turtle complex that makes Tortuguero’s beach globally significant. While green turtles dominate the rookery, hawksbills nest here in small numbers during the same general season, and the coral reef habitats along the broader Costa Rican Caribbean coast serve as foraging grounds for adult hawksbills year-round. The species’ Critically Endangered status — the most severe non-extinct category on the IUCN scale — means every nesting female documented at Tortuguero is conservation-relevant.

The historical record is grim: an estimated 8.98 million hawksbills were killed in the international tortoiseshell trade between 1844 and 1992. While the trade is now prohibited under CITES Appendix I, recovery is slow given the species’ low reproductive rate.

How to see them (honestly)

• On the beach: possible during the authorized night-tour program, June–November, but far less frequent than green turtle encounters — expect greens, treat a hawksbill as a bonus.
• Identification: smaller than a green turtle, with a noticeably narrower head, hooked beak, and overlapping scutes (green turtle scutes are non-overlapping). The tortoiseshell pattern is distinctive but can appear dark in low light.
• At sea: adult hawksbills surface to breathe and may be spotted on calm dawn boat tours near the river mouth; they favor reef-adjacent environments rather than open water.

Status note

The IUCN lists the hawksbill as Critically Endangered — a species that has declined approximately 80% over the past century. The tortoiseshell trade drove most of this loss; ongoing threats include reef degradation (which undermines foraging habitat), egg harvesting, bycatch, coastal development, and light pollution. Populations are recovering slowly in areas with effective nest protection, but the species’ biological pace of recovery is inherently limited by long juvenile development periods (15–20+ years to sexual maturity). Tortuguero’s protected beach status is directly relevant to this recovery arc.