This is a brief explanation for the data used in the paper **“Socioecology of the Australian Tree Skink (*Egernia striolata*)”** that is currently published in *Frontiers in Ecology and Evolution* (doi: 10.3389/fevo.2021.722455). We have uploaded a complete set of data to this repository, but if you would like access to the R code or any additional data for analyses performed outside of R (i.e., spatial autocorrelations conducted in GENALEX as reported in section 2.6) please simply contact **Dr. Julia Riley** via email at julia.riley87@gmail.com. Also, if you have any comments or questions, please email her with those too! The data that is uploaded is as follows: 1. Dataset used to summarise the social organisation of Tree Skink groups (as reported in Section 2.3.1) titled: *“full_albury_grouping data.csv”* 2. Datasets used to assess the relationship between relatedness, social associations, and spatial overlap of Tree Skinks (as reported in Sections 2.3.2 to 2.5). The datasets involved in this analyses are: - Grouping data with the subset of individuals required for the SNA: *“sna_albury_grouping data.csv”* - Matrix of relatedness between Tree Skinks: *“albury_relatedness_matrix.csv”* - Lizard attribute data: *“albury_lizard attributes.csv”* - Overall social network of our Albury Tree Skinks: *“overall_SNA.csv”* - Preferred social network our Albury Tree Skinks: *“pref_SNA.csv”* - Spatial overlap of home ranges: *“kud_95_overlap.csv”* - Spatial overlap of core ranges: *“kud_50_overlap.csv”* <br> 3. Summary of results from COLONY, CERVUS, and relatedness data used to assess the mating system of Tree Skinks (as reported in section 2.7) titled *“parentage analyses.xlxs”*