Potecuta

In classic "google it" fashion, you were right. It's a moth, Macroglossum stellatarum to be more exact. If not for your AmA I would've never bothered to Google this. Thanks :D

For a long time I thought hummingbirds are native to warmer climates, but recently I've seen some at my grandparents house (tons of flowers) and wasn't sure at first if they really are hummingbirds.

Do you have any ideas what species live in my area? This was happening in Piatra Neamț, România. It's near the mountains and above the 45th parallel.

Thank you :D

Hmm, that's really weird. It had the exact same flight pattern, hovering and body shape. Although the color was brown and didn't have the nice iridescent colors of the hummingbirds I've seen on the internet.