You're mostly correct, but apparently not totally :) - I did think that it was further north, but the human cases are usually only in south and central americ

You're mostly correct, but apparently not totally :) - I did think that it was further north, but the human cases are usually only in south and central america and africa. Nonetheless, there are some. https://pmc.ncbi.nlm.nih.gov/articles/PMC4809994/ https://pmc.ncbi.nlm.nih.gov/articles/PMC4809994/ (human cases in the US - but is primarily in animals) https://www.merckvetmanual.com/poultry/bloodborne-organisms-in-poultry/leucocytozoonosis-in-poultry https://www.merckvetmanual.com/poultry/bloodborne-organisms-... (birds only, but still north american disease) There's also an allergic reaction apparently due to large numbers of bites called simuliotoxicosis / black fly fever. There's also this mysterious one in europe. https://pmc.ncbi.nlm.nih.gov/articles/PMC7920075/ https://pmc.ncbi.nlm.nih.gov/articles/PMC7920075/ Aaaand there's this site claiming possible encephalitis transmission, although I kinda feel I'd prefer a better cite than that. https://www.mosquitomagnet.com/resources/faq-black-fly-other-insect-diseases https://www.mosquitomagnet.com/resources/faq-black-fly-other...