Possible Clues:

• Very English trebles, song surprisingly Italian
• From a northwest Italian port
• Farm birds flying over heads of number of vultures produced by Italians?
• Italian city's birds -- number with their usual formation coming in
• Even goes off one of those in northern Italy
• Cristoforo Colombo, per esempio
• Even goes badly for one of those in northern Italy
• Columbus, by birth
• Christopher Columbus, by birth
• Real-life don Vito