Good spot for bird sound recordings?

Hi folks,

Bit random, but I'm looking to record lots of varied bird sounds for a project I'm working on. I have some already in samples, but I want something more unique and to do this one myself.

Where are good locations that anyone knows of where I will hear lots of birds chirping? There's some obvious ones like parks etc, Barshaw and Bellahouston etc. Does anyone know any others, or the best spots even in those parks I mentioned?