Black-legged kittiwake (Rissa tridactyla) stomach content and stable isotope data from the Canadian Arctic

The objective of this dataset was to assess the diet of black-legged kittiwakes (Rissa tridactyla) in the Canadian Arctic using stomach content analysis and stable isotope analysis from liver tissues of black-legged kittiwakes collected near Mittimatalik (Pond Inlet), Nunavut, and Qikiqtarjuaq, Nunavut, in 2021. This resulted in two datasets: 1) Black-legged kittiwake diet data, which includes the date the bird was dissected, the bird ID number, the order, family, species (if known) of the prey item, the otolith number (if applicable), the status of the otolith (full, tip, greater than half), and the width (mm) and length (mm) of the otolith (if applicable); and 2) Stable isotope values of black-legged kittiwakes in the Canadian Arctic, which includes the location collected, year collection, common and scientific name of the species, sample ID number, age (if known), stable carbon (δ13C) and nitrogen (δ15N) values, and atomic C:N.