Types of Helicopters

[Atinas]

Is there a website where I could find an extensive gallery of various types of helicopters? Something like LensTip.com - lens review, lenses reviews, lens specification - Lenstip.com, where you can choose a lens manufacturer from the drop-down menu and it will show you a vast array of lens, only for helicopters?

I ask because sometimes I bump onto a helicopter I like, like this orangeblack one, and I have no idea what type of a helicopter is it. Are there any pointers on how to decipher which model is it?

It would be great if I could also somehow find some other information about a certain aircraft, such as what is it known for, usual use and some other information.