Introduction
The Slaty-breasted Tinamou (Crypturellus boucardi), also known as Boucard’s Tinamou, is a secretive, ground-dwelling bird of humid forests in Mexico and Central America. It belongs to the tinamou family, Tinamidae. Although it can fly, it usually moves quietly through leaf litter and dense undergrowth, where its subdued plumage makes it difficult to detect.
Physical Description
The Slaty-breasted Tinamou is a compact, medium-sized tinamou measuring approximately 27 centimetres in length. Adults have a dark slate-grey breast, a blackish head, a white throat and brown to chestnut upperparts. The lower body is generally paler, while the legs may be pinkish, reddish or bright red.
The sexes differ subtly in appearance. Females commonly show more conspicuous barring on the wings and are associated with the production of eggs for several males during the breeding season. Juveniles are precocial and develop adult-like size and plumage relatively quickly, although they remain lighter in mass while growing.
Its short bill, rounded body, strong legs and very short tail are characteristic of a forest tinamou. The combination of a dark breast, pale throat and reddish legs is useful when the bird is seen briefly at close range.
Range and Habitat
The species is a non-migratory resident of Central America. Its range extends from southern Mexico, including the Gulf-Caribbean lowlands and parts of the Pacific slope of Chiapas, through Belize, Guatemala, Honduras and Nicaragua to northern and eastern Costa Rica. Distribution is not continuous in all areas, and the species is primarily associated with suitable humid forest rather than open country.
Slaty-breasted Tinamous occupy tropical lowland evergreen forest, humid foothill forest and some secondary or regenerating forest with adequate cover. They are generally found from sea level to about 800 metres, although records from higher elevations, particularly in Mexico, have been reported. Tall forest with a reasonably closed canopy, damp ground and protective undergrowth appears to be especially important.
Two subspecies are generally recognised: the nominate C. b. boucardi in the northern part of the range and C. b. costaricensis farther south. The species is sedentary, although individuals move through relatively large home ranges within suitable forest.
Behaviour and Diet
Slaty-breasted Tinamous are mainly terrestrial, diurnal and secretive. They usually walk rather than fly, moving carefully through leaf litter and undergrowth. When disturbed, they may run rapidly before making a short, explosive flight into cover. They are often encountered singly, although males may maintain territories that overlap with the home ranges of several females.
Their diet includes fallen fruit, seeds and small invertebrates. Food is collected from the forest floor, sometimes while the bird scratches through leaf litter. By consuming fruit and later passing viable seeds, the species may contribute to forest regeneration and seed dispersal.
The song is a low, resonant and sometimes mournful whistle, often described as a repeated, hollow or plaintive phrase. Calling is most frequent in the morning and evening. Males use vocalisations to establish territories and attract females, while both sexes may use softer calls for contact.
Breeding behaviour
The species has a strongly polyandrous breeding system. A male establishes a territory and may attract two or more females. Females lay their eggs in a shallow ground nest, commonly near the base of a tree, among dense vegetation or beside raised roots. After laying, a female normally leaves the eggs and may mate with another male.
The male alone incubates the eggs, usually for about 16 days. A nest may contain eggs laid by more than one female, so the total clutch can be larger than the number normally produced by a single female. The chicks are precocial, leaving the nest soon after hatching and following the male. They can move and feed independently at an early age, although the male provides protection during the first part of their development.
Identification Tips
- Look for a stocky, short-tailed ground bird in dense humid forest rather than in the canopy.
- The dark slate-grey breast contrasts with the white throat and darker head.
- Brown or chestnut upperparts, barred wings in females and reddish legs are useful supporting features.
- Listen for a low, hollow whistle or mournful repeated phrase, especially during the early morning or late afternoon.
- The bird often reveals its presence by calling or by crossing a trail briefly, then disappearing into cover.
- Distinguish it from the more brown-toned Thicket Tinamou, Crypturellus cinnamomeus, by the Slaty-breasted Tinamou’s darker slate breast and white throat. Identification should also take account of location, as the two species can occur in parts of the same broad region.
Conservation Status
The Slaty-breasted Tinamou is currently classified as Vulnerable on the IUCN Red List. The category was revised from Least Concern following a reassessment of its distribution, habitat pressures and likely population decline.
The principal threats are the loss and fragmentation of humid forest through agriculture, logging, road development and other land-use changes. Hunting can also reduce local numbers, particularly where the species is already restricted to small or isolated forest remnants. The bird may persist in some secondary or regenerating habitats, but mature and structurally complex forest remains important for maintaining secure populations.
Conservation priorities include protecting remaining lowland and foothill forest, maintaining connections between forest blocks, managing hunting pressure and improving population monitoring across the species’ range. Research on local abundance, habitat use and the effects of forest degradation would help refine conservation planning.
Frequently Asked Questions
Where can the Slaty-breasted Tinamou be found?
It occurs from southern Mexico through Belize, Guatemala, Honduras and Nicaragua to northern and eastern Costa Rica. It is mainly found in humid forests on the Gulf-Caribbean side of Central America, with additional populations on parts of the Pacific slope in southern Mexico.
What habitat does the Slaty-breasted Tinamou use?
It prefers humid tropical evergreen and foothill forests with dense undergrowth and leaf litter. It can also use some secondary or regenerating forest when sufficient cover remains.
What does the Slaty-breasted Tinamou eat?
Its diet consists mainly of fallen fruit, seeds and small invertebrates collected from the forest floor. Its feeding habits may make it a useful seed disperser in forest ecosystems.
Can the Slaty-breasted Tinamou fly?
Yes. Like other tinamous, it is capable of flight but normally travels on foot. When alarmed, it may run through cover before making a short, rapid flight.
How does the Slaty-breasted Tinamou breed?
The male attracts several females and incubates the eggs after they are laid. Incubation lasts about 16 days, and the precocial chicks leave the nest soon after hatching.
Is the Slaty-breasted Tinamou endangered?
It is classified as Vulnerable, rather than Endangered, on the IUCN Red List. Habitat loss, forest fragmentation and hunting are the main recognised threats.
References
- American Ornithologists’ Union. 1998. Check-list of North American Birds, 7th edition. American Ornithologists’ Union. Species account for Crypturellus boucardi available in the Tinamidae checklist extract: https://americanornithology.org/wp-content/uploads/2019/07/AOSChecklistTin-Falcon.pdf. Accessed 8 September 2026.
- Binford, L. C. 1989. A Distributional Survey of the Birds of the Mexican State of Oaxaca. Ornithological Monographs 43. American Ornithologists’ Union, Washington, DC, 1–418. https://digitalcommons.usf.edu/ornithological_monographs/34. Accessed 8 September 2026.
- BirdLife International. 2022. Slaty-breasted Tinamou (Crypturellus boucardi): Revise global status? Globally Threatened Bird Forums, Red List status review. https://forums.birdlife.org/2022-1-slaty-breasted-tinamou-crypturellus-boucardi-revise-global-status/. Accessed 8 September 2026.
- Fink, D., Auer, T., Johnston, A., Strimas-Mackey, M., Ligocki, S., Robinson, O., Hochachka, W., Jaromczyk, L., Crowley, C., Dunham, K., Stillman, A., Davis, C., Stokowski, M., Sharma, V., Pantoja, V., Burgin, M., Crowe, S., Ray, I., Davies, I., Ruiz-Gutierrez, V., Wood, C. and Rodewald, P. 2025. eBird Status and Trends, Data Version: 2023. Cornell Lab of Ornithology, Ithaca, New York. https://doi.org/10.2173/WZTW8903.
- Gill, F., Donsker, D. and Rasmussen, P. (eds.). 2026. IOC World Bird List, version 15.2. International Ornithologists’ Union. https://www.worldbirdnames.org/new/ioc-lists/. Accessed 8 September 2026.
- Gomes, V., Bribiesca-Formisano, R., Rodríguez-Flores, C. I., Soberanes-González, C. A. and Arizmendi, M. del C. 2020. Slaty-breasted Tinamou (Crypturellus boucardi), version 1.0. In T. S. Schulenberg (ed.), Birds of the World. Cornell Lab of Ornithology, Ithaca, New York. https://doi.org/10.2173/bow.slbtin1.01.
- Lancaster, D. A. 1964. Life history of the Boucard Tinamou in British Honduras. Part I: Distribution and general behaviour. The Condor 66(3). https://digitalcommons.usf.edu/condor/vol66/iss3/1. Accessed 8 September 2026.
- Lancaster, D. A. 1964. Life history of the Boucard Tinamou in British Honduras. Part II: Breeding biology. The Condor 66(4): 253–276. https://sora.unm.edu/node/2174. Accessed 8 September 2026.
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