If Belleplain ambulances are going to give bicyclists a "warning

Dennis Township - If Belleplain ambulances are going to give bicyclists a "warning siren," they should do it when further away from a bicyclist. I almost fell off of my bike because I didn't know one of their ambulances was close behind me. They also yelled something at me. If they don't have on sirens (from a distance), how else is one to know they are approaching? Think safety for all.