Data and R code from Climate-mediated niche specialization for an Arctic seabird at the receding range limit.

Data: daily_ice_summary.rds - Canadian Sea Ice Service daily sea ice summary from the breeding season (July to August) at Coats Island and Cape Graham Moore, Nunavut, diveboutloc-rerouted-obs-envr_20.RDS - thick-billed murre used and available dive bout locations with environmental variables from Coats Island and Cape Graham Moore, Nunavut for resource selection functions, diveloc-obs-envir-depth.rds - thick-billed murre diving locations with environmental variables and diving depth from Coats Island and Cape Graham Moore, Nunavut for generalized linear mixed models. R code: rsf_models.r - R code for resource selection functions, glmm_models.r - R code for generalized linear mixed models.