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Effects of anthropogenic pressures on birds of the Andaman Islands have been documented to some extent, however studies on the effect of human activities on the behavioural response of these birds are limited. This study assessed the anti-predatory behaviour (flush response - FR and flight initiation distance - FID) of three owl species (Otus sunia, Otus balli, and Ninox obscura) in response to human stimuli and factors influencing it on the Andaman Islands. In total, 63 % of owls flushed from their roost sites in response to approaching human, and such a response varied between species. Similarly, FID varied widely among the species ranging from 4.23 to 6.73 m. The FR of N. obscura was influenced by the count of climbers, presence of spine, and branch status, while roost height, ambient temperature, and lower count of climbers contributed to a higher FID. For the two Otus species, camouflage and pairing were found to influence their FR while FID of O. balli was influenced by roost height, pairing, and presence of spines. Our results indicated that the anti-predatory behaviour of owls on the Andaman Islands was species- and site-specific and prolonged disturbance to their roost sites may affect the survival and reproductive rate of these owls.
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Anderson, D.W. & J.O. Keith (1980). The human influence on seabird nesting success: conservation implications. Biological Conservation 18(1): 65–80. https://doi.org/10.1016/0006-3207(80)90067-1
Babu, S., S. Sureshmarimuthu & H.N. Kumara (2019). Ecological determinants of species richness and abundance of endemic and threatened owls in the Andaman Islands, India. Ardeola 66(1): 89–100. https://doi.org/10.13157/arla.66.1.2019.sc3
Barrows, C.W. (1981). Roost selection by spotted owls: an adaptation to heat stress. The Condor 83(4): 302–309. https://doi.org/10.2307/1367496
Bennett, P.M. & I.P.F Owens (2002). Evolutionary ecology of birds: life histories, mating systems, and extinction. Oxford University Press, Oxford, 278pp.
Blumstein, D.T., L.L. Anthony, R. Harcourt & G. Ross (2003). Testing a key assumption of wildlife buffer zones: is flight initiation distance a species-specific trait?. Biological Conservation 110(1): 97–100. https://doi.org/10.1016/S0006-3207(02)00180-5
Bradsworth, N., J. White, A. Rendall, N. Carter & R. Cooke (2021). Where to sleep in the city? How urbanisation impacts roosting habitat availability for an apex predator. Global Ecology and Conservation 26: e01494. https://doi.org/10.1016/j.gecco.2021.e01494
Braimoh, B., S. Iwajomo, M. Wilson, A. Chaskda, A. Ajang & W. Cresswell (2018). Managing human disturbance: factors influencing flight-initiation distance of birds in a West African nature reserve. Ostrich 89(1): 59–69. https://doi.org/10.2989/00306525.2017.1388300
Burger, J. & M. Gochfeld (1998). Effects of ecotourists on bird behaviour at Loxahatchee National Wildlife Refuge, Florida. Environmental Conservation 25(1): 13–21. https://www.jstor.org/stable/44519418
Champion, H.G. & S.K. Seth (1968). A Revised Forest Types of India. Manager of Publications, Government of India, Delhi, 404pp.
Collins, S.A., G.J. Giffin & W.T. Strong (2019). Using flight initiation distance to evaluate responses of colonial‐nesting Great Egrets to the approach of an unmanned aerial vehicle. Journal of Field Ornithology 90(4): 382–390. https://doi.org/10.1111/jofo.12312
Cooper, W.E. (1997). Threat factors affecting antipredatory behavior in the broad-headed skink (Eumeces laticeps): repeated approach, change in predator path, and predator’s field of view. Copeia 1997(3): 613–619. https://doi.org/10.2307/1447569
Cooper, W.E. (2003). Risk factors affecting escape behavior by the desert iguana, Dipsosaurus dorsalis: speed and directness of predator approach, degree of cover, direction of turning by a predator, and temperature. Canadian Journal of Zoology 81: 979–984. https://doi.org/10.1139/Z03-079
Dowling, L. & F. Bonier (2018). Should I stay, or should I go: Modeling optimal flight initiation distance in nesting birds. PloS one 13(11): e0208210. https://doi.org/10.1371/journal.pone.0208210
Ganey, J.L., R.P. Balda & R.M. King (1993). Metabolic rate and evaporative water loss of Mexican spotted and great horned owls. The Wilson Bulletin 105(4): 645–656. https://www.jstor.org/stable/4163356
Ganey, J.L., W.M. Block & R.M. King (2000). Roost sites of radio-marked Mexican spotted owls in Arizona and New Mexico: sources of variability and descriptive characteristics. Journal of Raptor Research 34 (4): 270–278.
Gotanda, K.M., K. Turgeon & D.L. Kramer (2009). Body size and reserve protection affect flight initiation distance in parrotfishes. Behavioral Ecology and Sociobiology 63(11): 1563–1572. https://doi.org/10.1007/s00265-009-0750-5
Grubb, T.G. & R.M. King (1991). Assessing human disturbance of breeding bald eagles with classification tree models. The Journal of Wildlife Management 55(3): 500–511. https://doi.org/10.2307/3808982
Hemmingsen, A. (1951). The relation of shyness (flushing distance) to body size. Spolia zoologica Musei hauniensis 11: 74–76.
Holmes, T.L., R.L. Knight, L. Stegall & G.R. Craig (1993). Responses of wintering grassland raptors to human disturbance. Wildlife Society Bulletin (1973–2006) 21(4): 461–468. https://www.jstor.org/stable/3783420
König, C., F. Welck & B. Jan-Hendrik (1999). Owls: A Guide to the Owls of the World. Yale University Press, New Haven, Connecticut, 462 pp.
Malik, J.N., C.V.R. Murty & D.C. Rai (2006). Landscape changes in the Andaman and Nicobar Islands (India) after the December 2004 great Sumatra earthquake and Indian Ocean tsunami. Earthquake Spectra 22(3): 43–66. https://doi.org/10.1193/1.2206792
Martín, J. & P. López (2015). Hiding Time in Refuge, pp. 227–262. In: Cooper Jr., W. & D. Blumstein (Eds.). Escaping from Predators: An Integrative View of Escape Decisions. Cambridge University Press, Cambridge, 460pp.
Miles, J. (2014). Residual Plot. In: Balakrishnan, N., T. Colton, B. Everitt, W. Piegorsch, F. Ruggeri & J.L. Teugels (eds.) Wiley StatsRef: Statistics Reference Online. Electronic version accessed 31 March 2021. https://doi.org/10.1002/9781118445112.stat06619
Møller, A.P., W. Liang & D.S. Samia (2019). Flight initiation distance, color and camouflage. Current Zoology 65(5): 535–540. https://doi.org/10.1093/cz/zoz005
Nishiumi, N. & A. Mori (2015). Distance-dependent switching of anti-predator behavior of frogs from immobility to fleeing. Journal of Ethology 33(2): 117–124. https://doi.org/10.1007/s10164-014-0419-z
Papouchis, C.M., F.J. Singer & W.B. Sloan (2001). Responses of desert bighorn sheep to increased human recreation. Journal of Wildlife Management 65(3): 573–582. https://doi.org/10.2307/3803110
Portugal, S.J., L. Sivess, G.R. Martin, P.J. Butler & C.R. White (2017). Perch height predicts dominance rank in birds. Ibis 159(2): 456–462. https://doi.org/10.1111/ibi.12447
Rasmussen, P.C. & J.C. Anderton (eds.) (2005). Birds of South Asia: the Ripley guide. 1st ed. Vol. 1 & 2. Smithsonian Institution and Lynx Edicions, Washington, D.C. and Barcelona, pp. 1–378 & 1–683.
Rohner, C., C.J. Krebs, D.B. Hunter & D.C. Currie (2000). Roost site selection of Great Horned Owls in relation to black fly activity: An anti-parasite behavior?. The Condor 102(4): 950–955. https://doi.org/10.1093/condor/102.4.950
Samia, D.S., D.T. Blumstein, T. Stankowich & W.E. Cooper Jr. (2016). Fifty years of chasing lizards: new insights advance optimal escape theory. Biological Reviews 91(2): 349–366. https://doi.org/10.1111/brv.12173
Sapolsky, R.M., L.M. Romero & A.U. Munck (2000). How do glucocorticoids influence stress response? Integrating permissive, suppressive, stimulatory, and preparative actions. Endocrine Reviews 21: 55–89. https://doi.org/10.1210/edrv.21.1.0389
Solheim, R., K.O. Jacobsen, I.J. Øien, T. Aarvak & P. Polojärvi (2013). Snowy Owl nest failures caused by blackfly attacks on incubating females. Ornis Norvegica 36: 1–5. https://doi.org/10.15845/on.v36i0.394
Spaul, R.J. & J.A. Heath (2017). Flushing responses of Golden Eagles (Aquila chrysaetos) in response to recreation. The Wilson Journal of Ornithology 129(4): 834–845. https://doi.org/10.1676/16-165.1
Sproat, K.K., N.R. Martinez, T.S. Smith, W.B. Sloan, J.T. Flinders, J.W. Bates, J.G. Cresto & V.C. Bleich (2020). Desert bighorn sheep responses to human activity in south-eastern Utah. Wildlife Research 47(1): 16–24. https://doi.org/10.1071/WR19029
Stankowich, T. (2008). Ungulate flight responses to human disturbance: a review and meta-analysis. Biological conservation 141(9): 2159–2173. https://doi.org/10.1016/j.biocon.2008.06.026
Steidl, R.J. & R.G. Anthony (1996). Responses of Bald Eagles to human activity during the summer in interior Alaska. Ecological Applications 6 (2):482–484. https://doi.org/10.2307/2269385
Swarthout, E.C. & R.J. Steidl (2001). Flush responses of Mexican spotted owls to recreationists. The Journal of Wildlife Management 65(2): 312–317. https://doi.org/10.2307/3802910
Swarthout, E.C.H. (1999). Effects of backcountry recreation on Mexican Spotted Owls. M.S. Thesis. University of Arizona, Tucson.
Thiel, D., E. Ménoni, J.F. Brenot & L. Jenni (2007). Effects of recreation and hunting on flushing distance of capercaillie. The Journal of Wildlife Management 71(6): 1784–1792. https://doi.org/10.2193/2006-268
Velando, A. & I. Munilla (2011). Disturbance to a foraging seabird by sea-based tourism: implications for reserve management in marine protected areas. Biological Conservation 144 (3): 1167–1174. https://doi.org/10.1016/j.biocon.2011.01.004
Walsberg, G.E. (1985). Physiological consequences of microhabitat selection, pp. 389–413. In: Cody M.L. (eds.). Habitat selection in birds. Academic Press, New York, New York, USA, 558pp.
Walther, F.R. (1969). Flight behaviour and avoidance of predators in Thomson’s gazelle (Gazella thomsoni Guenther 1884). Behaviour 34(3): 184–220. https://doi.org/10.1163/156853969X00053
Watson, J.W. (1993). Responses of nesting bald eagles to helicopter surveys. Wildlife Society Bulletin 21(2): 171–178. https://www.jstor.org/stable/3782920
Zuberogoitia, I., J. Zabala, J.A. Martínez, J.E. Martínez & A. Azkona (2008). Effect of human activities on Egyptian vulture breeding success. Animal Conservation 11: 313–320. https://doi.org/10.1111/j.1469-1795.2008.00184.x