Denver backyard finches have been dying since June

[Flavia Hoefler]

Have other people in the front range observed finch die offs this year?   Symptoms do not match mycoplasmal conjunctivitis and most closely match symptoms of trichomoniasis, which I have read affects other varieties of wild finches (goldfinches; purple finches).  I have several times removed all food for 2-3 week periods and sterilized feeders, but the same symptoms have returned as soon as the finches figure out food is back.   Might there be a culprit carrier in the Eurasian collared doves that are in their second year in my area?

Thanks for any help you provide,