Saturday 25 May
Hawksbill turtle (Eretmochelys imbricata)
What’s the World’s Favourite Species?Find out here.
Hawksbill turtle fact file
- Find out more
- Print factsheet
Hawksbill turtle description
The Critically Endangered hawksbill turtle (Eretmochelys imbricata) has been exploited for thousands of years as the sole source of commercial tortoiseshell. The beautiful carapace is generally streaked and marbled with amber, yellow or brown and often has a strongly serrated edge (5). The strongly hooked beak on the narrow head gives rise to the hawksbill turtle's common name (6). Unlike other marine turtles, the scales (scutes) of the hawksbill turtle’s carapace are imbricate, or overlapping, hence the scientific name 'imbricata' (7).
- Caret, Tortue à bec faucon, Tortue à écailles, Tortue Caret, Tortue imbriquée.
- Tortuga de Carey.
Hawksbill turtle biology
The hawksbill turtle may take decades to mature, first breeding at 20 to 40 years of age (9). Upon reaching sexual maturity, the female will typically lay up to five clutches of around 100 to 140 eggs in a single breeding season, and then wait a few years before nesting again (6). Nesting is much more dispersed than in other marine turtles, but individuals do tend to return to a particular beach season after season (9). Having survived the dash to the sea, hawksbill hatchlings are believed to spend their first few years in the open ocean before returning to more sheltered coastal waters. Recent studies indicate that the oceanic phase may be shorter for hawksbills, or even omitted in certain regions, as hatchlings swim less vigorously than those of other species (7). Probably less than one out of 1,000 eggs will survive and reach adulthood (9).
Adults are opportunistic predators, using their sharp beak to prize invertebrate prey from crevices within the reef. Unusually amongst marine animals (to whom they are often unpalatable), sponges make up the majority of the hawksbill's diet (6).Top
Hawksbill turtle range
The hawksbill turtle is found throughout tropical waters worldwide, and is known to nest on beaches in at least 60 countries (8). Recent evidence indicates that it takes part in long distance migrations, with breeding and feeding grounds in very distant locations. However, the hawksbill turtle does tend to be more sedentary than other marine turtles species (5).Top
Hawksbill turtle habitat
Hawksbill turtles are mainly associated with the clear, relatively shallow water of coastal reefs, bays, estuaries and lagoons, with nesting generally occurring on remote, isolated sandy beaches (6) (8).Top
Hawksbill turtle status
The hawksbill turtle is classified as Critically Endangered (CR) on the IUCN Red List (1), and is listed on Appendix I of CITES (3), and Appendix I of the Convention on Migratory Species (CMS or Bonn Convention) (4).Top
Hawksbill turtle threats
Global numbers are very difficult to estimate but it appears that the hawksbill turtle has suffered a drastic decline, probably by as much as 80 percent over the last century (1). Major threats to survival come from illegal trade in the turtle's prized shell, known as tortoiseshell, which has been sought for jewellery and ornaments for centuries. There is also a substantial market for eggs, meat and even stuffed juveniles as exotic gifts in some parts of the world (10). Additional pressure on the global population comes from harvests to support traditional customs, the loss of nesting sites, accidental entanglement in fishing lines and the deterioration of coral reef systems which act as feeding sites for these turtles (11).
A further threat to the hawksbill turtle is global climate change. Average global temperatures are predicted to increase by at least 2 degrees Celsius in the next 40 years due to climate change. An increase in the temperature of the sand used for nesting could have serious consequences for the hawksbill turtle, as gender of the hatchlings is determined by incubation temperature. The outcome of this is likely to be a skewed sex ratio, which could threaten the stability of hawksbill turtle populations in the future (1) (12) (13).
Ocean levels are thought to have risen at an average rate of 1.8 millimetres per year since 1961. Ocean levels are predicted to rise even more rapidly in the future, while increases in storm frequency and severity are also expected. This is likely to lead to increased beach erosion and degradation, which could wash away hawksbill turtle nests and decrease nesting habitat (1) (12) (13).Top
Hawksbill turtle conservation
International trade in the hawksbill turtle is banned amongst signatory nations by its listing on Appendix I of the Convention on International Trade in Endangered Species (CITES) (3), but extensive illegal trafficking still occurs. Preventing this black market trade is the key to saving this species and TRAFFIC (the wildlife trade monitoring network) is involved in monitoring and highlighting this problem (14). In 1988, the government of the Seychelles took a very public stand against tortoiseshell trade by burning a stockpile of seized shells (4), in a manner reminiscent of burning ivory pyres in Kenya (10).
Action to save the world's marine turtles is being taken by many international bodies and recent increases in hawksbill nesting populations have been observed at a few well-protected sites (10). With successful monitoring of populations and a decrease in illegal trade, the hawksbill may respond well to long-term protection.Top
Find out more
For more information on the hawksbill turtle see:
CITES: Hawksbill Turtles in the Carribbean Region: Basic Biological Characteristics and Population Status:
WWF - Hawksbill Turtle:
Authenticated (23/09/02) by Dr Nicolas Pilcher. President, International Sea Turtle Society.Top
- The top shell of a turtle. In arthropods (insects, crabs etc), the fused head and thorax (the part of the body located near the head) also known as ‘cephalothorax’.
- The act of incubating eggs, that is, keeping them warm so that development is possible.
- Animals with no backbone, such as insects, crustaceans, worms, molluscs, spiders, cnidarians (jellyfish, corals, sea anemones), echinoderms, and others.
IUCN Red List (March, 2008)
- Witzell, W.N. (1983) Synopsis of the biological data on the Hawksbill turtle Eretmochelys imbricata (Linnaeus, 1766). FAO Fish. Synopses Number 137. Rome, Italy.
CITES (March, 2008)
CMS (June, 2002)
WWF - Hawksbill turtle (March, 2008)
- Ripple, J. (1996) Sea Turtles. Voyager Press, Vancouver.
- Pilcher, N. (2002) Pers. comm.
- Mortimer, J.A. (1982) Factors influencing beach selection by nesting sea turtles. In: Bjorndal, K. (Ed) Biology and Conservation of Sea Turtles, vol. 45. Smithsonian Institution Press, Washington, D.C.
CITES: Hawksbill Turtles in the Carribbean Region: Basic Biological Characteristics and Population Status (March, 2008)
OBIS-SEAMAP (March, 2008)
UNEP-WCMC Species Sheets - Hawksbill turtle (March, 2008)
IUCN (2009) Species and Climate Change: More than Just the Polar Bear. IUCN/Species Survival Commission. Cambridge, UK. Available at:
WWF: The Impact of Climate Change on Hawksbill Turtles (March, 2008)
TRAFFIC (March, 2008)
More »Related species
Play the Team WILD game
This species is featured in:
This species is featured in Jewels of the UAE, which showcases biodiversity found in the United Arab Emirates in association with the Environment Agency – Abu Dhabi.
This species is featured in:
This species is affected by global climate
change. To learn about climate change
and the species that are affected,
visit our climate change pages.
MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.
Terms and Conditions of Use of Materials
Copyright in this website and materials contained on this website (Material) belongs to Wildscreen or its licensors.
Visitors to this website (End Users) are entitled to:
- view the contents of, and Material on, the website;
- download and retain copies of the Material on their personal systems in digital form in low resolution for their own personal use;
- teachers, lecturers and students may incorporate the Material in their educational material (including, but not limited to, their lesson plans, presentations, worksheets and projects) in hard copy and digital format for use within a registered educational establishment, provided that the integrity of the Material is maintained and that copyright ownership and authorship is appropriately acknowledged by the End User.
End Users shall not copy or otherwise extract, alter or manipulate Material other than as permitted in these Terms and Conditions of Use of Materials.
Additional use of flagged material
Green flagged material
Certain Material on this website (Licence 4 Material) displays a green flag next to the Material and is available for not-for-profit conservation or educational use. This material may be used by End Users, who are individuals or organisations that are in our opinion not-for-profit, for their not-for-profit conservation or not-for-profit educational purposes. Low resolution, watermarked images may be copied from this website by such End Users for such purposes. If you require high resolution or non-watermarked versions of the Material, please contact Wildscreen with details of your proposed use.
Creative commons material
Certain Material on this website has been licensed to Wildscreen under a Creative Commons Licence. These images are clearly marked with the Creative Commons buttons and may be used by End Users only in the way allowed by the specific Creative Commons Licence under which they have been submitted. Please see http://creativecommons.org for details.
Any other use
Please contact the copyright owners directly (copyright and contact details are shown for each media item) to negotiate terms and conditions for any use of Material other than those expressly permitted above. Please note that many of the contributors to ARKive are commercial operators and may request a fee for such use.
Save as permitted above, no person or organisation is permitted to incorporate any copyright material from this website into any other work or publication in any format (this includes but is not limited to: websites, Apps, CDs, DVDs, intranets, extranets, signage, digital communications or on printed materials for external or other distribution). Use of the Material for promotional, administrative or for-profit purposes is not permitted.