Supporting data for PhD Thesis of Bartosz Marek MAJCHER, Titled: Understanding Thermal Vulnerability in Tropical Arthropods: The Roles of Habitat, Behaviour, Trophic Level, and Body Size. Covers microclimate variability across habitats in Hong Kong, The Roles of Habitat, Behaviour, Trophic Level, and Body Size. Measured thermal limits for over 3000 tropical arthropods, together with species taxonomy, functional traits, behavioural traits, as well as information on where and when the insects were sampled. The data is accompanied by a metadata README.txt file.