Nina O’Hanlon

Interests and responsibilities

Nina has a broad interest in ornithology and conservation, with a particular interest in anthropogenic threats to marine birds and their environment.

Nina also has a background in seabird foraging ecology and movement behaviour, which has involved a range of fieldwork and analysing large datasets. The skills and experience gained from her previous positions fit well with the seabird work of the Wetland & Marine Research Team.

Qualifications

PhD, University of Glasgow: ‘Spatial variation in Herring gull traits’, 2016
MRes Ecology and Environmental Management, University of York, 2011
BSc (Hons) Zoology, University of Newcastle-upon-Tyne, 2005

Recent BTO publications

Johnston, D., Langlois Lopez, S., Humphreys, E. & O’Hanlon, N. 2025. A review of the Biological Defined Minimum Population Scale (BDMPS) approach and methodology to apportioning non-breeding season impacts on seabirds arising from offshore wind farms. BTO Research Report 791:
Thaxter, C.B., Quinn, L., Atkinson, P., Booth Jones, K.A., Clark, N.A., Clewley, G.D., Green, R.M.W., O'Hanlon, N.J., Johnston, D.T., Masden, E.A., Ross-Smith, V.H., Sage, E., Scragg, E., Taylor, R., Burton, N.K.H. & Humpreys, E.H. 2025. Breeding and foraging habitat are important in determining foraging ranges of sympatric generalist species. Ibis doi:10.1111/ibi.13446
O’Hanlon, N.J., Jardine, D.C., Lennon, J., Svobodova, D., Swann, R.L., Ward, R.M., Humphreys, E.M. & Morrissey, B.J. 2025. Diet analysis of Kittiwake and Shag using DNA metabarcoding of faeces. Seabird 37: doi:10.61350/sbj.37.5
O'Hanlon, N.J., Clewley, G.D., Johnston, D.T., Thaxter, C.B., Langlois Lopez, S., Quinn, L.R., Boersch-Supan, P.H., Masden, E.A., Daunt, F., Wilson, J., Burton, N.H.K. & Humphreys, E.M. 2025. Partial niche partitioning in three sympatric gull species through foraging areas and habitat selection. Ecology and Evolution 15: doi:10.1002/ece3.71577
Harris, S.J., Baker, H., Balmer, D.E., Bolton, M., Burton, N.H.K., Caulfield, E., Clarke, J.A.E., Dunn, T.E., Evans, T.J., Hereward, H.R.F., Humphreys, E.M., Money, S. and O’Hanlon, N.J. 2024. Seabird Population Trends and Causes of Change: 1986–2023.

O’Hanlon, N.J., Thaxter, C.B., Clewley, G.D., Davies, J.G., Humphreys, E.M., Miller, P.I. Pollock, C.J., Shamoun-Baranes, J., Weston, E. & Cook, A.S.C.P. 2024. Challenges in quantifying the responses of Black-legged Kittiwake to habitat variables and local stressors due to individual variation. Bird Study 71: 48-64 doi:10.1080/00063657.2024.2305169
Harris, S., O'Hanlon, N. 2024. SMPnews - Issue 2 - Spring 2024. SMPnews
O’Hanlon, N.J., Clewley, G.D., Davies, J.G., Johnston, D.T., Booth Jones, K.A., Green, R.M.W., Weston, E., Humphreys, E.M. & Cook, A.S.C.P. 2024. Trial of the use of silicone cord leg-loop harnesses on Black-legged Kittiwake during the 2023 breeding season. BTO Research Report 772:
O’Hanlon, N.J., van Bemmelen, R.S.A., Conway, G.J., Thaxter, C.B., Aiton, H., Aiton, D., Balmer, D.E., Calladine, J.R., Harris, S.J. & Humphreys, E.M. 2024. New insights into the migration and wintering areas of Scottish-breeding Arctic Skuas. British Birds 117: 488-496
O'Hanlon, N.J., van Bemmelen, R.S.A., Snell, K.R.S., Conway, G.J, Thaxter, C.B., Aiton, H., Aiton, D., Balmer, D.E., Are Hanssen, S., Calladine, J.R., Hammer, S., Harris, S.J., Moe, B., Schekkerman, H., Tulp, I. & Humphreys, E.M. 2024. Atlantic populations of a declining oceanic seabird have complex migrations and weak migratory connectivity to staging areas. Marine Ecology Progress Series 730: 113-129 doi:10.3354/meps14533

Other publications

O’Hanlon, N.J., Bond A.L., Lavers, J.L., Masden, E.A., James, N.A. 2019. Monitoring nest incorporation of anthropogenic debris by Northern Gannets across their range. Environmental Pollution, 255: 113152.

O’Hanlon N.J., Alonso, S., Miller, J.A.O., McGill R.A.R., Nager R.G. 2019. Landscape‐mediated variation in diet is associated with egg size and maculation in a generalist forager. IBIS.

O’Hanlon, N.J., Nager, R.G. 2018. Identifying habitat-driven spatial variation in colony size of Herring Gulls Larus argentatus. Bird Study, 65:3, 306-316.

Finch, T., O’Hanlon, N., Dudley, S.P. 2017. Tweeting birds: online mentions predict future citations in ornithology. Royal Society Open Science, 4: 171371.

O’Hanlon, N.J., James, N.A., Masden, E.A., Bond A.L. 2017. Seabirds and marine plastic debris in the northeastern Atlantic: a synthesis and recommendations for monitoring and research. Environmental Pollution, 231: 1291-1301.

O’Hanlon N.J., McGill R.A.R., Nager R.G. 2017. Increased use of intertidal resources benefits breeding success in a generalist gull species. Marine Ecology Progress Series, 574: 193-210.

O’Hanlon, N.J., Lambert, M.S. 2017. Investigating brown rat Rattus norvegicus egg predation using experimental nests and camera traps. European Journal of Wildlife Research, 63: 18.

Nager, R.G., O’Hanlon, N.J. 2016. Changing numbers of three gull species in the British Isles. Waterbirds, 39: 15-28.

Gillingham, P.G., Bradbury, R.B., Roy, D.B., Anderson, B.J., Baxter, J.M., Bourne, N.A.D., Crick, H, Q., Findon, R.A., Fox, R., Franco, A., Hill, J.K., Hodgson, J.A., Holt, A.R., Morecroft, M.D., O’Hanlon, N.J., Oliver, T.H., Pearce-Higgins, J, W., Procter, D.A., Thomas, J.A., Walker, K.J., Walmsley, C.A., Wilson, R.J., Thomas, C.D. 2015. The effectiveness of protected areas in the conservation of species with changing geographical ranges. Biological Journal of the Linnean Society, 115: 707-717.

Thomas, C.D., Gillingham, P.G., Bradbury, R.B., Roy, D.B., Anderson, B.J., Baxter, J.M., Bourne, N.A.D., Crick, H, Q., Findon, R.A., Fox, R., Hodgson, J.A., Holth, A.R., Morecroft, M.D., O’Hanlon, N.J., Oliver, T.H., Pearce-Higgins, J, W., Procter, D.A., Thomas, J.A., Walker, K.J., Walmsley, C.A., Wilson, R.J., Hill, J.K. 2012. Protected areas facilitate species’ range expansions. PNAS, 109: 14063-14068.