"Recently, following a research report from the veterinary sector of USL, the local health authority, the most pressing problem in Venice has become the pigeons. Eight birds out of ten are carriers of toxoplasmosis, a parasitic infection that can occasionally be fatal, while others transmit salmonella, fungal diseases, or ticks. According to the monthly tests, their health is getting worse. The primary reason is related to their excessive number -- more than 70,000 -- which is greater than the human population of Venice. In the opinion of experts, the maximum should be less than 30,000 but, to obtain this result, as has been said many times before, it would be necessary to eliminate the St. Mark's street vendors who sell grain to tourists who, in turn, feed it to the birds."
(from Buongiorno Venezia - The News from Venice)
On a side note, strangely, I seem to post my rare news items on Venice's notorious pigeons on the same day each year...