Hi Joe,
The current iNaturalist API only allows for fuzzy searches for taxa. I actually submitted some code to address this problem a few months ago. The idea is to add a new API parameter called ‘exact’ that tells the API you only want exact matches. However, no one has responded to the code submission yet. @pleary - Any chance this pull request could be looked at: https://github.com/inaturalist/iNaturalistAPI/pull/626.