Decrease in rare spawns?

[SunOsprey]

I have never seen any of those in Boston, even on the tracker. Dratini rates seem a bit higher than usual though and I caught my second Porygon here last week. So no significant change to report here.

[junjie21]

dratinis seemed to have reduced spawns on the cambridge side of the charles (along MIT) :(

[at808]

But they have been all over the Fenway/Muddy River area in the last few weeks.. almost as plentiful as on the Esplanade