Dr Steve Portugal

  1. Article › Research › Peer-reviewed
  2. Published

    Perch height predicts dominance rank in birds

    Portugal, S., Sivess, L., Martin, G., Butler, P. & White, C., Apr 2017, In: Ibis. 159, 2, p. 456–462 7 p.

    Research output: Contribution to journalArticlepeer-review

  3. Published

    Pigeon leadership hierarchies are not dependent on environmental contexts or individual phenotypes

    Sankey, D., Biro, D., Ricketts, R., Shepard, E. & Portugal, S., May 2022, In: Behavioural Processes. 198, 104629.

    Research output: Contribution to journalArticlepeer-review

  4. Published

    Predicting the rate of oxygen consumption from heart rate in barnacle geese: effects of captivity and annual changes in body condition.

    Portugal, S., 9 Apr 2009, In: Journal of Experimental Biology.. 212, p. 2941-2948 doi:10.1242/jeb.034546.

    Research output: Contribution to journalArticlepeer-review

  5. Published

    Rapid development of brood-parasitic cuckoo embryos cannot be explained by increased gas exchange through the eggshell

    Portugal, S. J., Hauber, M. E., Maurer, G., Stokke, B. G., Grim, T. & Cassey, P., 1 Jan 2014, In: Journal of Zoology . 293, 4, p. 219-226 8 p.

    Research output: Contribution to journalArticlepeer-review

  6. Published

    Recording raptor behavior on the wing via accelerometry

    Halsey, L. G., Portugal, S. J., Smith, J. A., Murn, C. P., Wilson, R. P. & Portugal, S., 1 Jun 2009, In: Journal of Ornithology . 80, 2, p. 171-177 7 p.

    Research output: Contribution to journalArticlepeer-review

  7. Published

    Respirometry: Anhydrous drierite equilibrates with carbon dioxide and increases washout times

    White, C. R., Portugal, S. J., Martin, G. R., Butler, P. J. & Portugal, S., 1 Sep 2006, In: Physiological and Biochemical Zoology. 79, 5, p. 977-980 4 p.

    Research output: Contribution to journalArticlepeer-review

  8. Published

    Review: An embryo's eye view of avian eggshell pigmentation

    Maurer, G., Portugal, S. J., Cassey, P. & Portugal, S., 1 Nov 2011, In: Journal of Avian Biology. 42, 6, p. 494-504 11 p.

    Research output: Contribution to journalArticlepeer-review

  9. Published

    Self-organization of collective escape in pigeon flocks

    Papadopoulou, M., Hildenbrandt, H., Sankey, D., Portugal, S. & Hemelrijk, C., 10 Jan 2022, In: PLoS Computational Biology. 18, 1, e1009772.

    Research output: Contribution to journalArticlepeer-review

  10. Published

    Speckles of cryptic black-headed gull eggs show no mechanical or conductance structural function

    Maurer, G., Portugal, S. J., Mikšík, I. & Cassey, P., 1 Nov 2011, In: Journal of Zoology . 285, 3, p. 194-204 11 p.

    Research output: Contribution to journalArticlepeer-review

  11. Published

    Speed consensus and the ‘Goldilocks principle’ in flocking birds (Columba livia)

    Sankey, D., Shepard, E., Biro, D. & Portugal, S., Nov 2019, In: Animal Behaviour. 157, p. 105-119 15 p.

    Research output: Contribution to journalArticlepeer-review

  12. Published

    Testing the use/disuse hypothesis: Pectoral and leg muscle changes in captive barnacle geese Branta leucopsis during wing moult

    Portugal, S. J., Thorpe, S. K. S., Green, J. A., Myatt, J. P., Butler, P. J. & Portugal, S., 1 Aug 2009, In: Journal of Experimental Biology. 212, 15, p. 2403-2410 8 p.

    Research output: Contribution to journalArticlepeer-review

  13. Published

    The coevolutionary biology of brood parasitism: a call for integration

    Thorogood, R., Spottiswoode, C., Portugal, S. & Gloag, R., Apr 2019, In: Philosophical Transactions of the Royal Society of London B: Biological Sciences. 374, 1769, p. 1-7 7 p.

    Research output: Contribution to journalArticlepeer-review

  14. Published

    The fast and forceful kicking strike of the secretary bird

    Portugal, S., Campbell, M., Sparkes, E. & Daley, M., 25 Jan 2016, In: Current Biology. 26, 2, p. 58-59 2 p.

    Research output: Contribution to journalArticlepeer-review

  15. Published

    The origin and maintenance of metabolic allometry in animals

    White, C. R., Marshall, D. J., Alton, L. A., Arnold, P. A., Beaman, J. E., Bywater, C. L., Condon, C., Crispin, T. S., Janetzki, A., Pirtle, E., Winwood-Smith, H. S., Angilletta, M. J., Chenoweth, S. F., Franklin, C. E., Halsey, L. G., Kearney, M. R., Portugal, S. J. & Ortiz-Barrientos, D., 18 Mar 2019, In: Nature Ecology and Evolution. 3, p. 598-603 6 p.

    Research output: Contribution to journalArticlepeer-review

  16. Published

    The use of body mass loss to estimate metabolic rate in birds

    Portugal, S. J., Guillemette, M. & Portugal, S., 1 Mar 2011, In: Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology. 158, 3, p. 329-336 8 p.

    Research output: Contribution to journalArticlepeer-review

  17. Published

    Upwash exploitation and downwash avoidance by flap phasing in ibis formation flight

    Portugal, S., Hubel, T. Y., Fritz, J., Heese, S., Trobe, D., Voelkl, B., Hailes, S., Wilson, A. M. & Usherwood, J. R., 15 Jan 2014, In: Nature. 505, p. 399-402 4 p.

    Research output: Contribution to journalArticlepeer-review

  18. E-pub ahead of print

    Validating a Noninvasive Technique for Monitoring Embryo Movement In Ovo

    Pollard, A., Pitsillides, A. & Portugal, S., 16 May 2016, (E-pub ahead of print) In: Physiological and Biochemical Zoology. 89, 4, p. 331-339 9 p.

    Research output: Contribution to journalArticlepeer-review

  19. Published

    Variability in avian eggshell colour: A comparative study of museum eggshells

    Cassey, P., Portugal, S. J., Maurer, G., Ewen, J. G., Boulton, R. L., Hauber, M. E., Blackburn, T. M. & Portugal, S., 15 Oct 2010, In: PLoS ONE. 5, 8, e12054.

    Research output: Contribution to journalArticlepeer-review

  20. Published

    Vigilance patterns of wintering Eurasian Wigeon: Female benefits from male low-cost behaviour

    Portugal, S. J., Guillemain, M. & Portugal, S., 1 Jul 2011, In: Journal of Ornithology . 152, 3, p. 661-668 8 p.

    Research output: Contribution to journalArticlepeer-review

  21. E-pub ahead of print

    Visual fields and foraging ecology of Blacksmith Lapwings Vanellus armatus

    Cantlay, J., Portugal, S. & Martin, G., 14 Mar 2019, (E-pub ahead of print) In: Ibis. p. 1-6 6 p.

    Research output: Contribution to journalArticlepeer-review

  22. Published

    Visual fields, foraging and collision vulnerability in Gyps vultures

    Martin, G. R., Portugal, S. J., Murn, C. P. & Portugal, S., 1 Jul 2012, In: Ibis. 154, 3, p. 626-631 6 p.

    Research output: Contribution to journalArticlepeer-review

  23. Published

    Visual scoring of eggshell patterns has poor repeatability

    Brulez, K., Choudhary, P. K., Maurer, G., Portugal, S. J., Boulton, R. L., Webber, S. L., Cassey, P. & Portugal, S., 1 Jul 2014, In: Journal of Ornithology . 155, 3, p. 701-706 6 p.

    Research output: Contribution to journalArticlepeer-review

  24. E-pub ahead of print

    Weak asymmetric interspecific aggression and divergent habitat preferences at an elevational contact zone between tropical songbirds

    Jones, S., Tobias, J., Freeman, R. & Portugal, S., 26 Oct 2019, (E-pub ahead of print) In: Ibis. p. 1-29 29 p.

    Research output: Contribution to journalArticlepeer-review

  25. E-pub ahead of print

    When flocking is costly: reduced cluster-flock density over long-duration flight in pigeons

    Sankey, D. & Portugal, S., 15 Jul 2019, (E-pub ahead of print) In: The Science of Nature . 106, p. 1-5 5 p., 47.

    Research output: Contribution to journalArticlepeer-review

  26. Published

    White‐headed Vulture Trigonoceps occipitalis shows visual field characteristics of hunting raptors

    Portugal, S., Murn, C. & Martin, G., Apr 2017, In: Ibis. 159, 2, p. 463–466 4 p.

    Research output: Contribution to journalArticlepeer-review

  27. Published

    Why are birds' eggs colourful? Eggshell pigments co-vary with life-history and nesting ecology among British breeding non-passerine birds

    Cassey, P., Thomas, G. H., Portugal, S. J., Maurer, G., Hauber, M. E., Grim, T., Lovell, P. G., Mikšík, I. & Portugal, S., 1 Jul 2012, In: Biological Journal of the Linnean Society. 106, 3, p. 657-672 16 p.

    Research output: Contribution to journalArticlepeer-review

  28. Published

    Wild geese do not increase flight behaviour prior to migration

    Portugal, S. J., Green, J. A., White, C. R., Guillemette, M., Butler, P. J. & Portugal, S., 23 Jun 2012, In: Biology Letters. 8, 3, p. 469-72 4 p.

    Research output: Contribution to journalArticlepeer-review

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