A new species of small bird?
Great picture and great find.  But unfortunately I don't think that is a new species of bird...or even a bird at all!

It looks like a hummingbird hawk-moth, Macroglossum stellatarum.



Here you can really see the 'little trunk' (as you described it) known as a proboscis, which it uses to feed on flowers.

Fun fact: It's believed not to be a mimic of the hummingbird, but rather an example of convergent evolution.