Dead standing trees were only observed on Bird Island, in areas of yellow crazy ant
infestation. In Anoplolepis-free areas of Bird Island, and on Cousin, no dead trees
were observed, and most living trees showed high values of foliage cover (in Bird
Anoplolepis-free and Cousin sites, only 10 and 22% of trees showed less than
complete canopy cover). For live trees, there was a significant difference between
canopy cover in Bird Anoplolepis-free and Anoplolepis-infested areas (two-sample
t-test for difference in mean foliage cover, Bird (Anoplolepis-infested) vs. Bird
(Anoplolepis-free): t 5 4.76; P , 0.001). Mean canopy cover for live trees in Bird
Anoplolepis-infested areas was 73%, Bird Anoplolepis-free 95% and Cousin 97%.