Dr Steve Portugal

  1. 2016
  2. Published

    Associations Between Resting, Activity and Daily metabolic rate in Free-living Endotherms: No Universal Rule for Birds and Mammals

    Portugal, S., Green, J., Halsey, L. & Butler, P., 14 Apr 2016, In: Physiological and Biochemical Zoology. 89, 3

    Research output: Contribution to journalArticlepeer-review

  3. Published

    Eggshell pigment composition covaries with phylogeny but not with life history or with nesting ecology traits of British passerines

    Brulez, K., Portugal, S. & Cassey, P., Mar 2016, In: Ecology and Evolution. 6, 6, p. 1637–1645 9 p.

    Research output: Contribution to journalArticlepeer-review

  4. 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

  5. 2015
  6. Published

    Matching times of leading and following suggest cooperation through direct reciprocity during V-formation flight in ibis

    Voelkl, B., Portugal, S., Unsold, M., Usherwood, J., Wilson, A. & Fritz, J., 17 Feb 2015, In: Proceedings of the National Academy of Sciences of the United States of America. 112, 7, p. 2115–2120 6 p.

    Research output: Contribution to journalArticlepeer-review

  7. Published

    First light for avian embryos: eggshell thickness and pigmentation mediate variation in development and UV exposure in wild bird eggs

    Maurer, G., Portugal, S., Hauber, M. E., Mikšík, I., Russell, D. G. D. & Cassey, P., Feb 2015, In: Functional Ecology. 29, 2, p. 209-218 10 p.

    Research output: Contribution to journalArticlepeer-review

  8. 2014
  9. Published

    Nesting behaviour influences species-specific gas exchange across avian eggshells

    Portugal, S., Maurer, G. & Cassey, P., 15 Jul 2014, In: Journal of Experimental Biology.. 217, 18, p. 3326-3332 6 p., 10.1242/jeb.103291.

    Research output: Contribution to journalArticlepeer-review

  10. 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

  11. 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

  12. 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

  13. 2013
  14. Published

    Implantation reduces the negative effects of bio-logging devices on birds

    White, C. & Portugal, S., 4 Apr 2013, In: Journal of Experimental Biology.. 216, p. 537-542

    Research output: Contribution to journalArticlepeer-review