#1
Hello,
a male from our garden (northwest Germany). I first thought of
Eupeodes luniger, but there is a "wave" in vein R4+R5 (marked with a red arrow in pic #2). I am not sure, if it is strong enough to make this fly
Eupeodes lapponicus.
#3
Yes, there is a wave, but it is stronger in Lapposyrphus. Also, luniger has the sides of T5 yellow (as your animal) - black in Lapposyrphus.