Volume 51, No. 1

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Underwater kleptoparasitism on a human diver by a Galapagos Flightless Cormorant Nannopterum harrisi


1Marine Biology and Aquaculture, College of Science & Engineering, James Cook University, Queensland 4811, Australia
2Colegio de Ciencias Biológicas y Ambientales (COCIBA), Universidad San Francisco de Quito (USFQ), Diego de Robles s/n y Vía Interoceánica, Quito 170901, Ecuador
3Galápagos Science Center (GSC), Universidad San Francisco de Quito (USFQ) & University of North Carolina at Chapel Hill (UNC), Puerto Baquerizo Moreno, Galápagos, Ecuador
4Marine Earth and Atmospheric Sciences North Carolina State University, 2800 Faucette Drive ., Raleigh, North Carolina 27695, USA (


ÁLAVA-JURADO, J.M., KINGSFORD, M.J., BRANDT, M. & DORFMAN, E. 2023. Underwater kleptoparasitism on a human diver by a Galapagos Flightless Cormorant Nannopterum harrisi. Marine Ornithology 51: 41 - 42

Received 02 October 2022, accepted 18 December 2022

Date Published: 2023/04/15
Date Online: 2023/04/10
Key words: marine predation, Nannopterum, foraging behavior, kleptoparasitism, Galapagos Islands, Flightless Cormorant


We describe underwater kleptoparasitism on a human diver by a Galapagos Flightless Cormorant Nannopterum harrisi, a behavior that has not been previously described for this species.


ADVENTURING DAVE. 2020. Anhinga snakebird swimming with caught fish then cormorant steals it. YouTube, uploaded 12 October 2019. [Accessed at on 08 August 2022.]

BROCKMANN, H.J. & BARNARD, C.J. 1979. Kleptoparasitism in birds. Animal Behaviour 27: 487-514. doi:10.1016/0003-3472(79)90185-4

BUCKLEY, F.J. & TIGLER G.M. 1983. Frigatebird piracy on humans. Colonial Waterbirds 6: 214-217.

DARWIN, C. 1839. Journal of researches into the geology and natural history of the various countries visited by H. M. S. Beagle, under the command of captain Fitzroy, R.A. from 1832-1836. London, UK: Henry Colburn.

DEERING, B. 2017. A seagull just stole my doughnut: humans versus Herring Gulls in the fight for food. Field Studies. doi:10.2173/bna.124

DORFMAN, E.J. & KINGSFORD M.J. 2001. Distribution and behaviour of cormorants (Phalacrocorax spp.) in estuarine habitats in eastern Australia. Marine Biology 138: 1-10. doi:10.1006/jare.2001.0825

GOUMAS, M., BOOGERT, N.J. & KELLEY, L.A. 2020. Urban herring gulls use human behavioural cues to locate food. The Royal Society Open Science 7: 191959. doi:10.1098/rsos.191959

GROVE, J. & LAVENBERG. 1997. The Fishes of the Galápagos Islands. Stanford, USA: Stanford University Press.

HANDLEY, J. & PISTORIUS, P. 2016. Kleptoparasitism in foraging gentoo penguins Pygoscelis papua. Polar Biology 39: 391-395.

HAYWARD, J., MEGNA, L.C. & PAYNE, B.G. 2014. Feeding interactions between juvenile and adult Flightless Cormorants. Marine Ornithology 42: 9-10.

KÄLLANDER, H. 2013. Intraspecific kleptoparasitism in flock-fishing Great Crested Grebes (Podiceps cristatus) and Great Cormorants (Phalacrocorax carbo) - a cost to participants? Ornis Hungarica 21: 36-40. doi:10.2478/orhu-2013-0014

MAHENDIRAN, M. & URFI, A.J. 2010. Foraging patterns and kleptoparasitism among three sympatric cormorants (Phalacrocorax spp.) from the Delhi region, North India. Hydrobiologia 638: 21-28. doi:10.1007/s10750-009-0002-8

MILLS, K. L. 1998. Multispecies seabird feeding flocks in the Galápagos Islands. The Condor 100: 277-285. doi:10.2307/1370268

RIBAK, G., WEIHS, D. & ARAD Z. 2004. How do cormorants counter buoyancy during submerged swimming? The Journal of Experimental Biology 207: 2101-2114. doi:10.1242/jeb.00997

TOWNSEND, C.H. 1929. The flightless cormorant in captivity. The Auk 46: 211-213. doi:10.2307/4075699

TRAYLER, K.M., BROTHERS, D.J., WOOLLER, R.D. & POTTER, I.C. 1989. Opportunistic foraging by three species of cormorants in an Australian estuary. Journal of Zoology 218: 87-98. doi:10.1111/j.1469-7998.1989.tb02527.x

VALLE, C.A. 1995. Effective population size and demography of the rare flightless Galápagos cormorant. Ecological Applications 5: 601-617. doi:10.2307/1941970

VALLE, C.A. & COULTER, M.A. 1987. Present status of the flightless cormorants, Galapagos penguin and greater flamingo populations in the Galapagos Islands, Ecuador, after the 1982-83 El Niño. The Condor 89: 276-281. doi:10.2307/1368477

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