In reply to Rob Parsons:
> Mosquitos were implicated in transmission of myxomatosis among rabbits in Australia. Don't know if this is still accepted as a theory. <
Edit after googling:
https://theconversation.com/can-mosquitoes-spread-coronavirus-134898
"......But for a mosquito to become infected, it first needs to bite an infected animal, .....Mosquitoes can transmit a number of viruses, including dengue, yellow fever, chikungunya, Zika and Ross River virus. ...... But they can’t transmit many other viruses, including HIV and Ebola."
Apparently there is little or no evidence that that a mosquito is infected itself, but just that it is contaminated and passes on the disease.
Post edited at 10:03