Figure 1. A map showing the location of trees sampled in 2018 (yellow circles), 2019 (blue circles) and 2020 (brown circles) by scientists and partner schools (A). Panels B-E show examples of 200 m radius buffers centered on sampled oak trees, with varying percentages of local canopy cover and urbanization. Panel B has 100 % of local canopy cover and 0 % of urbanization; panel C has 45 % of local canopy cover and 40 % of urbanization; panel D has 0 % of local canopy cover and 100 % of urbanization; and panel E has 30 % of local canopy cover and 10 % of urbanization. An interactive version of this map (A) is also included in the supplementary material as Figure A . The aerial images (B, C, D and E) are based on images from Bing maps, 2021.