Various methods are used to locate the wild species viz.direct ,indirect methods.Survey,visual observations,trap methods,finding out ecological indices,GPS tech.,etc.Habitat preference refer to the habitat that a speciesprefer species

It is interesting and challenging to quantify at species level due to limited availability of environmental variables for wild species.So enviromental variables of interest are measured and habitat selection can be quan tified comparing their used habitat

It depends on your purpose, time, and budget. Many methods determine habitat preference for wildlife based on presence-absence/presence-only.

Such as: Logistic regression, R, Biomapper, MaxEnt