“hurdle” and exclude checklists predicted to be present
but having observed counts of zero and only include checklists with
non-zero observed counts in the count model. This resulted in a
substantial improvement in the PPMs for the count and relative abundance
estimates, especially the Poisson deviance measure, across a set of 20
test species at their full spatiotemporal extent. This change also means
that the relative abundance values themselves are much higher than in
previous versions.</li>
<li>CHANG