| The opilionids are hygrophilous, have low vagility and are primarily nocturnal and cryptic. |
| Animals with little vagility and small population or individual size live in largely empty niche space. |
| In elasmobranchs, we hypothesize that vagility increases with body size, vagility is lowest in benthic species, higher in benthopelagic species, and highest in pelagic species. |
| Despite this result the role of synanthropic flies in the transmission of certain helminthiases should not be discounted because of their vagility and feeding mechanisms. |
| Contraction of native old forest can limit occurrence of old forest associated species, especially species with limited vagility. |
| Mites cannot colonise by walking from home to home, not just because of their low vagility, but because the outdoor environment is relatively hostile. |
