For my own purposes I wrote a Julia implementation of the Continuous Boyce Index, which is a measure designed specifically for presence-only models (typically species distribution models). Would it be of interest for this package, or is it too specific?

My implementation for now is just on this repo with code for my paper: https://github.com/tiemvanderdeure/AfricanMalariaVectors/blob/master/src/cbi.jl. It is already a statisticalmeasures implementation - so all that's needed is to copy-paste the code.

Lots of R packages implement this also, e.g. https://rdrr.io/github/adamlilith/enmSdm/man/contBoyce.html. It was proposed in this paper: https://doi.org/10.1016/j.ecolmodel.2006.05.017