capture-recapture - glitter hats on primary school kids at fruit break. watch them disperse! Then recapture from same spot that you set the original ten off..
DISTRIBUTION and ABUNDANCE of chewy at school...
https://saintaugsydney-my.sharepoint.com/:x:/r/personal/ayres_a_saintaug_nsw_edu_au/_layouts/15/Doc.aspx?sourcedoc=%7BF4FA7A5B-C451-4D18-936F-1DFBFBDF01C9%7D&file=Abundance%20estimate%20-%20number%20of%20chey%20patches%20on%20the%20asphalt.xlsx&wdLOR=cC85382A5-ED8F-554B-B4B5-160A6F1125F7&fromShare=true&action=default&mobileredirect=true