The data are three distance sampling surveys of Australian plants; Brassica sp., Grevillea australis adults and Grevillea australis seedlings. Data were collected in 2011. Transects were 100 m total for the Brassica survey, 20 m total for each of the Grevillea surveys. Observations were recorded to a max. perpendicular distance of 2 m for the Brassica and G. australis seedlings surveys, and 5 m for the G. australis adult survey.