Something very strange has happened to observations of rock elm (Ulmus thomasii) on iNat. There used to be a high density of observations in the Midwest (MN, WI and a few in IL, IN, MI, OH). Now, however, there is only one verifiable observation in MN and two in OH. When you include casual observations, only three additional observations show up - two in MI and one in OH.
Where did the rest of them go?? @owenclarkin, by far iNat’s top observer of rock elm, has observed the same phenomenon. We are out of explanations!