i made my own bar chart race thing in Observable, leveraging its existing D3-based example: https://observablehq.com/@robin-song/inaturalist-species-bar-chart-race.
it can accept URL parameters. so for example, to get species observed in Texas, you could go to: https://observablehq.com/@robin-song/inaturalist-species-bar-chart-race?place_id=18. (it takes some time to load all the data. so please be patient while it’s loading data.)
I’ll probably make a few tweaks later, such as making bar colors reflect iNat’s iconic taxon color scheme, but i think this is good enough for now.