Since 2008, Ryan Norris and his graduate students have been working on a marked population of Savannah sparrows located on Kent Island, New Brunswick in the Bay of Fundy. This population was originally marked and followed by Nat Wheelwright in the late 1980’s and the Norris lab continues to monitor the fate and performance of all birds in the study area (over 10 thousand nests have been found to date) to examine the factors that influence fitness and population abundance of this migratory songbird. In addition to this long-term study, we have also been tracking departure dates and migration routes of a number of individuals over multiple years and, in collaboration with Amy Newman (University of Guelph), examining how early-life events influence the adult physiology, lifetime reproductive success, and survival. In collaboration with Dan Mennill and Stephanie Doucet (University of Windsor), one of our new projects is examining the cultural evolution of Savannah sparrow song (see picture and text below).
Moran, I, Doucet, SM, Newman, AEM, Norris, DR & Mennill, DJ. 2018. Quiet violence: Savannah sparrows respond to playback-simulated rivals using soft songs as aggressive signals. In press: Ethology
Woodworth, BK, Wheelwright, NT, Newman, AEM, & Norris, DR. 2017. Local density regulates songbird reproductive success through effects on double-brooding and nest predation. Ecology 98:2039-2048.
Newman, AEM, Hess, H, Woodworth, BK & Norris, DR. 2017. Time as a tyrant: the minute, hour and day make a difference for corticosterone concentrations in wild nestlings. General & Comparative Endocrinology 250:80-84.
Woodworth, BK, Wheelwright, NT, Newman, AEM, Schaub, M & Norris, DR. 2017. Winter temperatures limit population growth rate of a migratory songbird. Nature Communications 8: 14812.
Woodworth, BK, Newman, AEM, Turbek, SP, Dossman, BC, Hobson, KA, Wassenaar, LI, Mitchell, GW, Wheelwright, NT & Norris, DR. 2016. Differential migration and the link between winter latitude, timing of migration and breeding in a songbird. Oecologia 181: 413-422.
Pakkala, JJ, Norris, DR, Sedinger, JS & Newman, AEM. 2016. Experimental effects of early-life corticosterone on the HPA axis and pre-migratory behaviour in a wild songbird. Functional Ecology 30: 1149-1160.
Mitchell, GW, Woodworth, BK, Taylor, PD & Norris, DR. 2015. Age-specific differences in flight duration and groundspeed are driven by wind conditions aloft: an automated telemetry study. Movement Ecology 3:19.
Williams, H, Levin, I, Norris, DR, Newman, AEM & Wheelwright, NT. 2013. Three decades of cultural evolution in Savannah sparrow song. Animal Behaviour 85: 213-223.
Mitchell, GW, Wikelski, M, Newman, AEM, & Norris, DR. 2012. Timing of breeding carries over to influence migratory departure in a songbird: an automated radiotracking study. Journal of Animal Ecology 81: 1024-1033.
Mitchell, GW, Guglielmo, CG, Wheelwright, NT & Norris, DR. 2012. Short- and long-term costs of reproduction in a migratory songbird. Ibis 154: 325-337.
Wheelwright, NT, Graf, ES & Norris, DR. 2012. Consistency in size, shape, and colouration of Savannah Sparrow eggs within and between breeding seasons. Condor 114: 412-420.
Mitchell, GW, Guglielmo, CG, Wheelwright, NT, Freeman-Gallant, CR & Norris, DR. 2011. Early life events carry-over to influence pre-migratory condition in a free-living songbird. Public Library of Science, One 6(12): e28838.
Rae, L, Mitchell, GW, Guglielmo, CG, Mauck, RM & Norris, DR. 2009. Radio transmitters do not affect the body condition of Savannah sparrows during the fall pre-migratory period. Journal of Field Ornithology 80: 434-441.