Black-capped Petrel Pterodroma hasitata Scientific name definitions

Yvan Satgé, Adam Brown, Jennifer A. Wheeler, and Kate E. Sutherland
Version: 3.1 — Published February 2, 2024

Distribution

Introduction

Black-capped Petrel is a critically rare and local breeder in the Caribbean, with populations known to nest in Haiti and the Dominican Republic. Birds disperse over the Caribbean Sea, Gulf of Mexico, and western North Atlantic. Historical distributions are described in detail in Simons et al. (5). The current breeding distribution is described in details in Wheeler et al. (2). Here we provide a summary of Simons et al. (5) and Wheeler et al. (2), and any other relevant information.

Breeding Range

Terrestrial Range

Nesting is confirmed on Hispaniola only. Nest numbers provided as of October 2020. Detailed accounts of nesting areas can be found in "Appendix 2: Sites Profiles" of the 2021 Conservation Update and Action Plan (2).

In Haiti, most nests have been found on La Visite escarpment (La Visite National Park; n = 42) and in Morne Vincent (Forêt des Pins I National Park; n = 17), both located in the Massif de la Selle mountain range. In May 2022, two active nests were found on Pic de la Selle (Environmental Protection in the Caribbean, 2022). Nesting is probable on Pic Macaya and Pic Formon of Massif de la Hotte, on the remainder of the La Visite escarpment (no nests have been located but groundings, acoustic evidence, and/or detections by radar highly suggest that breeding activity is occurring).

In the Dominican Republic, nests have been found in western (Loma del Toro; n = 28) and eastern Sierra de Bahoruco (Loma Quemada; n = 7), both in Sierra de Bahoruco National Park, and in the southeastern Cordillera Central (Valle Nuevo National Park; n = 11).

In Dominica, nesting has not yet been confirmed, but the groundings of two petrels in 2007 and 2010 and the detection by radar of petrel-like targets (43, 44) suggest that nesting is probable (most likely on the high forested peaks of Morne Diablotins and Morne Trois Pitons). In January 2022, a petrel was observed at night, flying away from Morne Micotrin, near Morne Trois Pitons (45).

In Cuba, records of petrels rafting on the sea near the coast and/or heard or observed flying inland towards the steep mountainsides (46, 47, 48; Pointon, eBird) suggest that nesting is probable in the Sierra Maestra of southeastern Cuba (most likely in the areas of Pico Turquino and Pico la Bayamesa), though definitive evidence has yet to be acquired.

In Guadeloupe, although automated acoustic surveys have so far failed to record calling petrels (49), nesting is suspected based on radar surveys (50) and audiovisual observations (51).

In Jamaica, nesting is suspected based on a few radar detections (52).

Marine Range

At sea, Black-capped Petrel occurs year-round in the western North Atlantic and is regularly present in the adjacent basins of the Caribbean Sea and Gulf of Mexico. This range is mostly limited to tropical and subtropical waters from 10°N to 40°N and 80°W to 65°W, and is relatively confined and discrete within these bounds. It is very rarely observed above 40°N, but forays into Canadian waters have been recorded as far north as 43°N in petrels tracked by satellite (12). It is a casual visitor to areas east of 65°W, with 16 records between 1850–2022 (Table 1). The southern extent of the range is not as well understood. Putative records from the South Atlantic lack strong documentation; in particular, a record off Brazil (53) now appears unsubstantiated (5). Despite some observation effort in the western tropical Atlantic, the most southerly observations in the Atlantic are confined to coastal waters of the Lesser Antilles (54, 55), except for one sighting 450 mi east of Barbados (Johnston, eBird). Seabird surveys conducted off Guyana between fall 2017 and summer 2019 (77 days total) did not record Black-capped Petrel (J. Tims, personal communication).

Atlantic. The primary range includes neritic Gulf Stream waters and pelagic waters from Cape Canaveral, Florida, US in the south (ca. 28.5°N), to New Jersey, US in the north (ca. 38°N). The range extends eastward from the outer continental shelf to ca. 74°W. The core range is concentrated along the outer continental shelf offshore Cape Hatteras, North Carolina, US. Starting in the late 1970s, numerous observations have been recorded at sea in US waters; to date, more than 5,500 records have been confirmed (56). Black-capped Petrel is scarce in the Sargasso Sea; satellite-tracked petrels do not regularly venture into the area, and only a few historical and contemporary observations have been recorded there, on, or around Bermuda. Petrels are present in all seasons in the Atlantic, but more common in late summer and fall (5).

Winship et al. (57) modeled the distribution of Black-capped Petrel along the US outer continental shelf; using data from at-sea surveys compiled in Sussman and U.S. Geological Survey (56), they compared the relative density of the species to multiple spatial and temporal predictor variables and developed seasonal maps of its spatial distribution. Resulting models show a distribution that is limited to a band of pelagic waters along the outer continental shelf in the US Exclusive Economic Zone, with seasonal hotspots offshore the South Atlantic Bight (spring, summer, and winter) and offshore the Outer Banks of North Carolina (summer, fall, and winter).

Caribbean. Knowledge of Black-capped Petrel distribution in the region is based on tracking data of few individuals (n = 6; 24, 16) and limited at-sea observation (fewer than 100 observation records since 1953; summarized in 55). The primary range appears to be confined to the central Caribbean Sea between 67°W and 77°W, with repeated use of the Guajira upwelling off Colombia and Venezuela, and mixed waters between Cuba, Jamaica, and Hispaniola. Our understanding for the rest of the Caribbean Basin is incomplete. Records are scattered in the western Caribbean Sea, in particular in the Darien Gulf off Panama and Colombia. In the eastern Caribbean Sea, repeated observations off Guadeloupe and other at-sea observations in the area suggest a regular presence (consistent with probable nesting on Dominica and with suspected nesting in Guadeloupe)(54). Black-capped Petrel has been observed in all seasons in the area (55).

Gulf of Mexico. Rarely recorded (9 records between 1900–1990) until systematic seabird surveys were organized in 2010–2011 and 2017–2019. Since then, about 40 additional observations have been recorded (23). Petrel observations are more regular in the eastern Gulf, along the continental shelf and slope, from the Florida Keys in the southeast to De Soto Valley in the northwest. The age, breeding status, and origin of birds using the Gulf of Mexico are unclear. Most observations occurred at the outset of the breeding season (end of July to September; 23).

Breeding Black-capped Petrels were historically assumed to commute to Gulf Stream waters off the US coast (5). Recent racking of chick-rearing petrels nesting on Hispaniola, however, seems to partly challenge this assumption. Indeed, of 16 foraging trips made by six tracked petrels in Jodice et al. (24) and Satgé et al. (16), 10 were to upwelling waters off the Guajira peninsula; 3 were to mixed waters between Jamaica, Haiti, and Cuba; 1 was to the western Caribbean; and 2 to Gulf Stream waters. This suggests that, although breeding petrels may forage in the western North Atlantic, they are more likely to stay within the bounds of the Caribbean Sea during chick-rearing. Information during incubation is lacking.

Pelagic observations and satellite tracking suggest that dark and light forms have distinct distributions at sea in the western North Atlantic (12). The dark form seems more common in Gulf Stream waters off the southeastern US, and appears concentrated within an approximate 200-km strip of waters extending eastward from the continental shelf into the Gulf Stream. The light form seems more common in mixed pelagic waters of the Middle Atlantic Bight, extending over a wider area between the continental shelf and the northern edge of the Gulf Stream (12).

Historical Changes to the Distribution

Prehistoric and historic records suggest that Black-capped Petrel nested on at least five islands in the Caribbean (Jamaica, Hispaniola, Guadeloupe, Dominica, and Martinique), and possibly on Cuba.

Cuba

There are no records of the occurrence of the species on or around Cuba before the mid-1970s (5). In 1977, adults were collected at sea off a point of land called “La Bruja” in the Sierra Maestra, presumably near a breeding colony (58). Nesting sites still remain to be located.

Jamaica

A report by Verrill (59) of the occurrence of both Black-capped Petrel and Jamaican Petrel on Jamaica exists, but cannot be substantiated. No other historical records of Black-capped Petrel exist for Jamaica, though the darker and smaller Jamaican Petrel (now considered extinct) was recorded, and specimens were collected, until the mid-1800s (5). Simons et al. (5) add: “As small islands in the Indian Ocean and in the southern and western North Atlantic support more than one breeding species of Pterodroma, it is reasonable to think that this was also the case in the West Indies.”

Haiti

Pre-Columbian remains encountered between 1,760 m and 2,060 m above sea level in Massif de la Selle suggest a possible prehistoric distribution in other mountainous areas on Hispaniola. However, no information seems to exist on Black-capped Petrel presence in Haiti in historic times, even during colonization (5). The earliest account dates from 30 June 1938, with the grounding of a fledging bird in Port-au-Prince. The rediscovery by Wingate (21) of breeding activity in Massif de la Selle prompted further searches that are still ongoing throughout the country.

Dominican Republic

Little historic information is available. Bones found in prehistoric middens in Haiti suggest that the species may have been present in similar habitats in the Dominican Republican part of Hispaniola as well. The earliest historic records are from two accounts of stranding reported near the coast and inland in 1920 and 1928 respectively (60). The presence of a small nesting population was confirmed in 1981 in western Sierra de Bahoruco, near the border with Haiti (60); the colony was relocated in 1996 (61). Since then, small scattered groups of nesting petrels have been located in the eastern Sierra de Bahoruco and in the southern Cordillera Central, thus suggesting that, in prehistoric times, the species may have been distributed across the island of Hispaniola.

Guadeloupe

Nesting Black-capped Petrels disappeared from the island around 1850, following hunting and the introduction of predators. The species nested on Soufrière Mountain in the 1800s and, as late as the 1890s, it was reported to be nesting as low as 500 m above sea level (62). In 1847, an earthquake caused the collapse of a side of Nez Cassé ridge, near la Soufrière, effectively destroying the remaining colony there. It is suspected that a small nesting population still remains on the island; unidentified flying and calling Procellariiformes were recorded in December 1991 at dusk on a ridge below Pic de la Soufrière (Lorvelec cited in 51), but systematic acoustic surveys failed to detect the species in recent years (49).

Dominica

The species was numerous and well known on Dominica in the early 1800s; historically, the largest portion of the population may have nested there (5). Black-capped Petrels were abundant and widespread on the island until at least 1858 (63), and the last confirmed date of nesting is 1862 (64). Localized searches in the early 1900s failed to locate nesting sites. Petrels were collected on the island in 1932, but an expedition in October/November of 1964 found no evidence of nesting petrels (21). In the 1970’s to 1990’s, expeditions in Dominica’s forests encountered Black-capped Petrels calling or flying (65). In 1977, petrels were heard calling near Morne Diablotin; in 1980, birds were heard in the southern parts of island; in 1982, small numbers were observed along southeast coast and flying inland after dark; in 1984, a flock was seen offshore of Delices in April; in 1989, bird were observed flying off the coast near Morne Fous and potentially coming ashore; in 1990, an adult bird was found grounded in Roseau; and 1997, birds were observed flying over Morne Verte (66).

Martinique

Black-capped Petrel was extirpated on Martinique in pre-Columbian times by the indigenous Carib, who used the bird as a source of food (5). The species has not been recorded on the island since.

Distribution of the Black-capped Petrel - Range Map
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  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Black-capped Petrel

Recommended Citation

Satgé, Y., A. Brown, J. A. Wheeler, and K. E. Sutherland (2024). Black-capped Petrel (Pterodroma hasitata), version 3.1. In Birds of the World (S. M. Billerman, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.bkcpet.03.1
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