Mean number of arthropods (SE) in relation to forested habitat types and type of sample (location selected by migrants or systematically sampled on transect).

The abundance of arthropods differed between habitat types (all P<0.001 from a zero-inflated hurdle model [see text]) and samples collected at systematically sampled locations (transects) had fewer arthropods than areas selected by migrants (selected; P<0.001) but there was a significant interaction between habitat type and type of sample (P<0.001). Within pine habitat (n = 37 selected, n = 133 transects) there were more arthropods in areas selected by migrants. The opposite was true within hardwood habitat (n = 213 selected, n = 132 transects) and there was no difference in arthropod abundance between sample types within mixed habitat (n = 150 selected, n = 130 transects).