Markham's storm petrel

Markham's storm petrel (Oceanodroma markhami) is a species of storm petrel in the family Hydrobatidae. An all-black seabird, Markham's storm petrel is described as hard to differentiate from the black petrel Loomelania melania in life, and was once described as conspecific, or biologically identical, with Tristram's storm petrel Oceanodroma tristrami. It inhabits open seas in the Pacific Ocean around Peru, Chile, and Ecuador, but only nests in northern Chile and Peru, with 95% of all known breeding populations in 2019 found in the Atacama Desert. First described by British ornithologist Osbert Salvin in 1883, the bird was named in honor of Albert Hastings Markham, a naval officer who collected a specimen off Peru.

Markham's storm petrel

Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Procellariiformes
Family: Hydrobatidae
Genus: Oceanodroma
Species:
O. markhami
Binomial name
Oceanodroma markhami
(Salvin, 1883)
Distribution: red = breeding, yellow = non-breeding
Synonyms[1][2]

Markham's storm petrel nests in natural cavities in saltpeter and small openings between rocks, with pairs producing one egg per season. After hatching, fledglings make their way to sea, and can be either attracted to or disoriented by artificial lights. The diet of Markham's storm petrel consists of fish, cephalopods, and crustaceans, with about ten percent of stomach contents traceable to scavenging according to a 2002 study. Since at least 2012, Markham's storm petrel has been listed as an endangered species in Chile, and, in 2019, the International Union for Conservation of Nature (IUCN) classified the conservation status of Markham's storm petrel as Near Threatened due to habitat loss on its nesting grounds. The Servicio Agrícola y Ganadero (SAG), a department of the Ministry of Agriculture of Chile, has undertaken conservation efforts in the country.

Taxonomy

The storm petrel family, Hydrobatidae, is a group of seabirds characterized by long legs and a high adaption to marine environments; within it, the subfamily Oceanitinae comprises storm petrels mostly endemic to the southern hemisphere, with the subfamily Hydrobatinae predominately endemic to the northern. In Handbook of the Birds of the World, vol. 1, author Carles Carboneras states Hydrobatidae probably diverged from other petrels at an early stage, with storm petrel fossils rare, only found dating from the Upper Miocene in California. Wilson's storm petrel Oceanites oceanicus may have been the first storm petrel to inhabit the Northern Hemisphere, thus possibly starting the subfamily Hydrobatinae of which Markham's storm petrel is a member.[3] In Hydrobatinae, Markham's storm petrel is a member of the genus Oceanodroma, and is comparatively large compared to other members in the genus, which also comprises small seabirds.[4] The only other genus in the subfamily Hydrobatinae is Hydrobates, which contains solely the European storm petrel Hydrobates pelagicus and its subspecies.[5]

British ornithologist Osbert Salvin first described the Markham's storm petrel as Cymochorea markhami in 1883.[2][6] Markham's storm petrel is named after Sir Albert Hastings Markham, a British explorer and naval officer who picked up a specimen off Peru.[7][8] The bird was thought by ornithologist James L. Peters in 1931 as conspecific, or biologically identical, with Tristram's storm petrel Oceanodroma tristrami, though the two species were later distinguished by tarsus size.[2] Similarly, ornithologist Reginald Wagstaffe considered Tristram's storm petrel a subspecies of Markham's storm petrel in 1972, though current practice as of 2008 recognized them as different species.[9] In 2016, the IUCN reclassified Oceanodroma markhami as Hydrobates markhami based on reclassification in HBW and BirdLife International Illustrated Checklist of the Birds of the World, volume 1, by founder of HBW Josep del Hoyo and British ornithologist Nigel J. Collar.[1] The genus Oceanodroma was found to be paraphyletic with respect to Hydrobates and all former Oceanodroma species were transferred to Hydrobates,[10][11] though, as of their July 2020 update, the International Ornithologists' Union classifies the species under Oceanodroma.[12]

Its name in Spanish literature is Golondrina de mar negra.[13][14]

Description
A Markham's storm petrel feeds while hovering over the water at Galápagos Islands.

Markham's storm petrel is an all-black to sooty brown storm petrel with a dull lead-gray gloss on its head, neck and mantle in fresh plumage. Its ventral, or frontal, area, from the neck down, and wing lining are blackish brown, and become almost fuscous, or brownish-gray, with wear of the plumage. External edges of wing coverts in the bird become whitish with wear, but are normally brown; the whitening produces a broad grayish bar that generally extends closer to the wing's bend than what American ornithologist Robert Cushman Murphy observed as a somewhat similar mark in the black petrel Loomelania melania. Its iris is brown, its bill and feet are black, and its tail is deeply forked. Two female specimens taken from 00°18′N 81°51′W in August 1967, both with small gonads and unused oviducts, had heavy contour molt and light fat.[15] Murphy described the species as difficult to distinguish in life from the black petrel, with the chief difference being a much shorter tarsus.[2][4]

Adult males have a wingspan of 172.7 millimetres (6.80 in) compared to a wingspan of 169.8 millimetres (6.69 in) in adult females, and the tarsus is 23.9 millimetres (0.94 in) in adult males and 24.2 millimetres (0.95 in) in females. Tails are 92.7 millimetres (3.65 in) in adult males and 89.4 millimetres (3.52 in) in adult females. Sexes are alike. Eggs are described as pure white without gloss.[2]

Ornithologists Larry B. Spear and David G. Ainley report that Markham's storm petrel has a more leisurely flight pattern than that of the black petrel, and states the Markham's storm petrel has a similar flight pattern to Leach's storm petrel. In 1980, Canadian author RGB Brown stated the birds tended to glide over two observations, with shallow and rapid wingbeats,[16] though an observation by American ornithologist Rollo Beck described its wingbeats as slow, and slower than the more rapid wingbeats of Wilson's storm petrel Oceanites oceanicus and Elliot's storm petrel Oceanites gracilis.[2] Markham's storm petrel typically flies greater than one meter over the ocean surface, compared to the black petrel.[17]

Distribution and habitat

Markham's storm petrel inhabits waters in the Pacific Ocean around Ecuador, Peru, and Chile,[4][18] though sightings have occurred on the equator west of the Galápagos Islands,[15] within the Panama Bight,[19] and off of Baja California.[20] Sightings off of Baja California might mistake Markham's storm petrel for the black storm petrel due to difficulties of distinguishability in the field.[15] Spear and Ainley (2007) observed Markham's storm petrel from 29.90°S 118.02°W / -29.90; -118.02 to 16.55°N 118.02°W / 16.55; -118.02, which expanded its westward range from an observation conducted by ornithologist Richard S. Crossin in 1974.[17] Its presence is highly unlikely in the Atlantic Ocean outside of freak vagrancies,[21] and in 2007, and Spear and Ainley classified the species as endemic to the Humboldt Current.[17] Despite its range, Markham's storm petrel only nests in Peru and Chile.[1]

An observation conducted by Spear and Ainley (2007) from 18°N to 30°S, west to 115°, found greatest densities of the bird during austral autumn, the non-breeding season, close to the coast near central Peru, while during spring densities bifurcated between southern Peru–northern Chile and an area roughly 1,700 kilometres (1,100 mi) west thereto.[17] Nesting colonies were unknown in 1931,[2] though 1,144 nests, equal to a population of approximately 2,300 nesting pairs, were found in 1992 5 kilometres (3.1 mi) inland on Paracas Peninsula in Peru.[22][23] After two separate discoveries in Chile in 2013, one of nesting sites south of the Acha valley in Arica Province by a group of ornithologists and one of a recording of bird singing by a biologist working for a consulting company, and after further exploration in November 2013 based on the recording,[18][24] in 2019, populations of 34,684 nests in Arica, 20,000 nests in Salar Grande, and 624 nests in Pampa de la Perdiz were found in the Atacama Desert of northern Chile, which translated to about 95% of the known breeding population at the time.[25]

Behavior and ecology
External media
Audio
Vocalizations of Markham's storm petrel from the Cornell Lab of Ornithology's Macaulay Library
Video
Video of Markham's storm petrel from Macaulay Library

Markham's storm petrel nests in natural cavities and holes in saltpeter crusts, and in small openings between rocks, with saltpeter cavities reported in both Pampa de Camarones in northern Chile and Paracas Peninsula.[22][24] In Peru, egg laying occurs from late June to August;[22] in Chile, an analysis of three colonies in the Atacama Desert found a five-month reproductive cycle, from arrival at colonies to departure of fledglings, across all three colonies, though pairs could reproduce asynchronously, which could lead to an overall ten-month reproductive span.[25] Pairs produce one egg per season,[26] and adults in nests were found to vocalize when a conspecific recording of vocalizations was played at the entrance to the nest.[25] Mean width of the widest part of openings to nest burrows in Chile was measured at 10.3 centimetres (4.1 in) with a standard deviation of ± 3.1 centimetres (1.2 in), with the narrowest part measured at 6.8 centimetres (2.7 in) with a deviation of ± 1.9 centimetres (0.75 in). The average depth of the burrows was greater than 40 centimetres (16 in).[18] After hatching, in Chile, the fledglings move towards the sea,[27] with fledglings either attracted to or disoriented by artificial lights, an occurrence common to burrow nesters in the order Procellariiformes.[18][28]

Among a study by Spear, Ainley and William A. Walker of the National Marine Mammal Laboratory, diets of thirty different species of eastern tropical Pacific Ocean avifauna taken from 1983–1991, a sample of fifteen Markham's storm petrel and thirty prey samples found a diet of fish, Myctophidae, namely Diogenichthys laternatus, and the Photichthyidae Vinciguerria lucetia, among different food types, with a high diet diversity among small species of Procellariiformes.[29] A 2002 study in Marine Ornathology that examined a total of 95 Markham's storm petrel, collectively, from Paracas Peninsula and La Vieja Island in central Peru found that its main diet by mass consisted of fish, namely the Peruvian anchovy Engraulis ringens, cephalopods, namely the octopus Japetella sp., and crustaceans, namely the pelagic squat lobster Pleuroncodes monodon, with about ten percent of analyzed stomach contents suggestive of scavenging. Based on large variations in the types of food it consumes, and its tendency to scavenge, biologist Ignacio García-Godos concluded Markham's storm petrel was a forager which opportunistically finds food near the surface of the ocean.[30] The proportion of birds that feed–rest, compared to flying in transit, was significantly higher in austral autumn than spring in Spear and Ainley's 2007 observation.[17]

In 2018, researchers Patrich Cerpa, Fernando Medrano and Ronny Peredo found the ectoparasite stick-tight flea Hectopsylla psittaci, in the family Hectopsyllidae, on two birds out of ten captured in Pampa de Chaca within the Arica y Parinacota Region, with both specimens found in the lorum on each bird; both fleas were neosomatic females, with legs chopped at the coxa, trochanter or femur. The turkey vulture Cathartes aura served as a possible source for the transition between hosts, as Cerpa, Medrano and Peredo observed the two nesting in the same colony.[31]

The bird has been described as "one of the least known seabirds in the world".[25]

Threats and conservation

The IUCN estimated the population of Markham's storm petrel in 2019 as between 150,000 and 180,000 individuals, with between 100,000 and 120,000 mature individuals,[1] based on an estimate by researcher Fernando Medrano in 2019, which combined a new colony description with previous findings by researcher Rodrigo Barros in 2019, and estimated the global breeding population at 58,038 pairs.[32] The IUCN estimated the population of Markham's storm petrel was in decline generally based on an estimate by Barros et al. (2019), who estimated up to 20,875 fledglings die each year,[25] though the IUCN noted juvenile seabirds have a higher mortality rate in general based on environmental parameters, age, and sex.[1] The IUCN could not give a specific estimate as to decline among mature individuals as tendencies for mature populations were unknown.[1] Prior to 2019, no concrete population estimates for Markham's storm petrel existed, with a 2004 estimate by Brooke placing the population at likely in excess of 30,000 individuals,[33] a 2007 estimate by Spear and Ainley placing the population between 806,500 in austral spring and 1,100,000 in austral autumn,[17] and a 2012 IUCN estimate placing the population at 50,000 overall individuals.[34]

Despite its "very large" population size, in 2019, the IUCN classified the conservation status of Markham's storm petrel as Near Threatened due to habitat loss on its nesting grounds.[1] Since at least 2012, the bird has been classified as endangered in Chile,[18] and, in 2018, the Chilean Ministry of the Environment (MMA) classified the bird as En Peligro de Extinción [in danger of extinction] by its Reglamento de Clasificación de Especies.[35][36] Conservation efforts have been undertaken by the SAG, a department of the Ministry of Agriculture of Chile. In April 2014, the SAG stated it "already ... rescued" a "large amount" of juveniles who lost their way based on lighting in cities, a phenomenon that had been evident in the region for at least ten years prior.[14] In 2018, the SAG reports it returned approximately 2,000 juvenile birds to their natural habitat after the birds fell on streets, the birds believing they had already reached the coast.[27] Along with volunteers from a civil organization aimed at protecting the bird, the SAG handed out informational brochures to citizens in March 2019 which informed citizens about the start of the juvenile flight season and instructed citizens what to do if they found a grounded Markham's storm petrel (grounding is a process which often results in death by starvation or predation).[25][36]

Chief threats to Markham's storm petrel in Chile include garbage, roadways across nesting colonies, mining, new construction and development, and artificial lights.[25] In 2013, Juan C. Torres-Mura and Marina L. Lemus of the Unión de Ornitólogos de Chile reported seeing bulldozer trails, dogs and an encampment of road construction workers near nesting areas.[18] Other than habitat loss, salt mines in northern Chile may also provide a source of habitat disturbance through artificial lights; a salt mining company in Chile, for instance, reported over a three-month span that 3,300 fledglings had been grounded, due to their lights.[28] In September 2019, the MMA produced a Recuperación, Conservación y Gestión de Especies [Recovery, Conservation and Management of Species] plan which included Markham's storm petrel, and which sought to evaluate proposals such as updating a light pollution standard to mitigate the affects of artificial lights on the birds and designating a nesting site at Pampa de Chaca as a protected area.[13][35]

gollark: > because you normally dont want to calculate 74^773 by hand.WHO SAYS?
gollark: Wait, why do you even need control flow like that if your program is ENTIRELY DETERMINISTIC?
gollark: Except just doing boring identical computation.
gollark: I... see.
gollark: Well, it limits the amount of programs you can run rather a lot.

References
  1. BirdLife International (2019). "Hydrobates markhami". IUCN Red List of Threatened Species. 2019. Retrieved December 10, 2019.CS1 maint: ref=harv (link)
  2. Murphy, Robert Cushman (1936). Oceanic Birds of South America: A Study of Species of the Related Coasts and Seas, Including the American Quadrant of Antarctica, Based upon the Brewster-Sanford Collection in the American Museum of Natural History. 2. The Macmillan Company. pp. 739–741.
  3. Carboneras, Carles (1992). "Family: Hydrobatidae, Storm-petrels". In del Hoyo, J.; Elliot, A.; Sargatal, J. (eds.). Handbook of the Birds of the World. 1. Lynx Edicions. pp. 258–259.
  4. Drucker, J.; Jaramillo, A. (2020). Schulenberg, Thomas S (ed.). "Markham's Storm-Petrel Oceanodroma markhami". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.maspet.01. (subscription required)
  5. "Hydrobatinae". Integrated Taxonomic Information System. Archived from the original on June 6, 2020. Retrieved June 5, 2020.
  6. Salvin, Osbert (1883). "List of the birds collected by Captain A. H. Markham on the west coast of America". Proceedings of the Zoological Society of London. 1883 (Part 3): 419–432 [430].
  7. Jobling, James A. (2010). Helm Dictionary of Scientific Bird Names. Christopher Helm. p. 242. ISBN 9781408125014. S2CID 82496461.
  8. "Markham's storm petrel: Bird of the Week". American Bird Conservancy. Archived from the original on May 31, 2020. Retrieved May 30, 2020.
  9. Christidis, Lee; Boles, Walter E., eds. (2008). Systematics and Taxonomy of Australian Birds. CSIRO Publishing. p. 82. ISBN 9780643065116.
  10. Robertson, Bruce C.; Stephenson, Brent M.; Goldstien, Sharyn J. (2011). "When rediscovery is not enough: Taxonomic uncertainty hinders conservation of a critically endangered bird". Molecular Phylogenetics and Evolution. 61 (3): 949–952. doi:10.1016/j.ympev.2011.08.001. ISSN 1055-7903. PMID 21855642.
  11. Wallace, S.J.; Morris-Pocock, J.A.; González-Solís, J.; Quillfeldt, P.; Friesen, V.L. (2017). "A phylogenetic test of sympatric speciation in the Hydrobatinae (Aves: Procellariiformes)". Molecular Phylogenetics and Evolution. 107: 39–47. doi:10.1016/j.ympev.2016.09.025. ISSN 1055-7903. PMID 27693526.
  12. Gill, Frank; Donsker, David; Rasmussen, Pamela (2020). "Master Lists: Life List+ (v10.2 red, Excel File XLSX, 4.6Mb)" (Excel). International Ornithologists' Union. doi:10.14344/IOC.ML.10.2. Retrieved August 7, 2020.
  13. Levi, Paula Diaz (January 22, 2020). "Continúa el ocaso de las golondrinas de mar: piden reducir contaminación lumínica y proteger sitios de nidificación". Ladera Sur (in Spanish). Archived from the original on June 1, 2020.
  14. "SAG inicia rescate de golondrinas de mar negra" (in Spanish). Servicio Agrícola y Ganadero. April 14, 2014. Archived from the original on June 1, 2020.
  15. Crossin, Richard S. (1974). "The Storm Petrels (Hydrobatidae)". In King, Warren B. (ed.). Pelagic Studies of Seabirds in the Central and Eastern Pacific Ocean. Smithsonian Contributions to Zoology. p. 187. doi:10.5479/si.00810282.158. hdl:10088/5305.
  16. Brown, RGB (1980). "The Field Identification of Black and Markham's storm-petrels Oceanodroma melania and O. markhami" (PDF). American Birds. 34: 868. Archived from the original (PDF) on May 31, 2020.
  17. Spear, Larry B.; Ainley, David G. (2007). "Storm-Petrels of the Eastern Pacific Ocean: Species Assembly and Diversity along Marine Habitat Gradients". Ornithological Monographs. American Ornithological Society (62): 8, 13, 27, 37–40. doi:10.2307/40166847. JSTOR 40166847. (subscription required)
  18. Torres-Mura, Juan C.; Lemus, Marina L. (2013). "Breeding of Markham's Storm-Petrel (Oceanodroma markhami, Aves: Hydrobatidae) in the Desert of Northern Chile" (PDF). Revista Chilena de Historia Natural. Sociedad de Biología de Chile. 86 (4): 497–499. doi:10.4067/S0716-078X2013000400013.
  19. Spear, Larry B.; Ainley, David G. (1999). "Seabirds of the Panama Bight". Waterbirds: The International Journal of Waterbird Biology. 22 (2): 197. JSTOR 1522207. (registration required)
  20. Pyle, Robert (1993). "A Markham's Storm-Petrel in the northeastern Pacific" (PDF). Western Birds. 24: 108–110.
  21. Flood, Robert L. (2009). "'All-dark' Oceanodroma storm-petrels in the Atlantic and Neighbouring Seas" (PDF). British Birds. 102: 365.
  22. Jahnckea, Jamie (1993). "Primer informe del área de anidación de la golondrina de tempestad negra Oceanodroma markhami (Salvin, 1883)". In Castillo de Mar uenda E (ed.). Memorias X Congreso Nacional de Biología (in Spanish). pp. 339–343.
  23. Jahnckea, Jamie (1994). "Biología y conservación de la golondrina de tempestad negra Oceanodroma markhami (Salvin 1883) en la península de Paracas, Perú". Informe Técnico (in Spanish). APECO.
  24. Schmitt, Fabrice; Rodrigo, Barros; Norambuena, Heraldo. "Markham's Storm Petrel Breeding Colonies Discovered in Chile" (PDF). Neotropical Birding. WINGS Birding Tours Worldwide. pp. 5–10. Archived from the original (PDF) on April 11, 2016.
  25. Barros, Rodrigo; Medrano, Fernando; Norambuena, Heraldo V.; Peredo, Ronny; Silva, Rodrigo; de Groote, Felipe; Fabrice, Schmitt (2019). "Breeding Phenology, Distribution and Conservation Status of Markham's Storm-Petrel Oceanodroma markhami in the Atacama Desert". Ardea. 107 (1): 75, 77–79, 81. doi:10.5253/arde.v107i1.a1. (subscription required)
  26. Torres, Amalia. "Los polluelos son atraídos por las luces de la ciudad y no logran llegar al mar. Este año se organizó por primera vez una brigada que recibe a las aves caídas y que se encarga de cuidarlas y liberarlas". El Mercurio (in Spanish). Archived from the original on May 31, 2020. Retrieved May 31, 2020.
  27. Yáñez, Cecilia (April 21, 2019). "La triste historia de la golondrina de mar que se está perdiendo en la ciudad". La Tercera (in Spanish). Archived from the original on March 2, 2020.
  28. Gilman, Sarah (July 20, 2018). "South America's Otherworldly Seabird". The Atlantic. Archived from the original on May 11, 2020.
  29. Spear, Larry; Ainley, David; Walker, William (2007). "Foraging Dynamics of Seabirds in the Eastern Tropical Pacific Ocean" (PDF). Studies in Avian Biology. Cooper Ornithological Society. 35: 1, 43, 73. Archived from the original (PDF) on June 8, 2020.
  30. García-Godos, Ignacio; Goya, Elisa; Jahncke, Jamie (2002). "The Diet of Markham's Storm Petrel Oceanodroma Markhami on the Central Coast of Peru" (PDF). Marine Ornathology. 30 (2): 77, 79, 81–82. Archived from the original (PDF) on April 26, 2018.
  31. Cerpa, Patrich; Medrano, Fernando; Peredo, Ronny (2018). "Jumps from desert to the sea: presence of the stick–tight flea Hectopsylla psittaci in Markham's Storm–petrel (Oceanodroma markhami) in the north of Chile". Revista Chilena de Ornitología (in Spanish). Unión de Ornitólogos de Chile. 24 (1): 40–42.
  32. Medrano, Fernando; Silva, Rodrigo; Barros, Rodrigo; Terán, Daniel; Peredo, Ronny; et al. (2019). "Nuevos antecedentes sobre la historia natural y conservación de la golondrina de mar negra (ocenodroma markhami) y la golondrina de mar de collar (ocenodroma hornbyi) en Chile" [New Information on the Natural History and Conservation of Markham's Storm-petrel (Oceanodroma markhami) and Hornby's Storm-petrel (Oceanodroma hornbyi) in Chile] (PDF). Revista Chilena de Ornitología (in Spanish). Unión de Ornitólogos de Chile. 25 (1): 26.
  33. BirdLife International (2018). "Hydrobates markhami". IUCN Red List of Threatened Species. 2018. Retrieved June 6, 2019.
  34. BirdLife International (2012). "Hydrobates markhami". IUCN Red List of Threatened Species. 2012. Retrieved June 6, 2019.
  35. "Resolución exenta n° 1113: Da inicio al proceso de el.aboración del plan de recuperación, conservación y gestión de las golondrinas del mar del norte de chile" (PDF) (in Spanish). Ministerio del Medio Ambiente. September 11, 2019. Archived from the original (PDF) on June 7, 2020.
  36. "SAG inició campaña de difusión para rescate de golondrinas de mar negra". El Longino (in Spanish). March 19, 2019. Archived from the original on June 6, 2020.
  • "Golondrina de mar negra" (in Spanish). Markham's storm petrel profile on Red de Observadores de Aves y Vida Silvestre de Chile [Chilean Bird and Wildlife Observer Network]
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