Weeknotes: 12th October 2026

Habitat maps Missing data As mentioned last week, I'm working towards doing a regional habitat map based on global data, to see if we can utilise Tessera's global reach to make up for local data-deficiencies. But in doing this I ended up doing a review what data we were using from GBIF, and found a couple of interesting points. The major one was that despite GBIF containing species occurrence data from many different sources, including Cornell's eBird repository which is often cited in the space I'm working and indeed is used by the Lumbierres et al habitat crosswalk work the major work I'm building upon, the way I was filtering GBIF meant that the eBird data was being dropped. This is quite major as it turns out 83% of occurrences in Madagascar where we have major data-deficiency issues are in eBird. Digging in, this happened because the eBird data doesn't contain any GPS accuracy information, and we specify that we want occurrences with high degrees of GPS accuracy given Tessera is…