This archive contains photo-ID data sourced from Happywhale.com and R code for preprocessing and creating abundance estimations Please note data has many copyrights and can only be used for recreation of abundance estimation in the Cheeseman et al RSOS manuscript; all other use requires permission from the authors The data found here is demised from the original export format from Happywhale of all identified 2001-2022 encounters of humpback whales in the North Pacific population, as of 15 December 2023. Data includes all Pacific Arctic encounters, all Pacific Ocean encounters from Honduras north, and all Panama through Nicaragua encounters from November 7 through May of each study period year. Please contact info@happywhale.com for any questions or use