Flamingos

To get to this flamingo you have to jump on the overhead railway at its other end.

Use this ramp.

Then drive along the tracks to the other end.

The nearest entrace to the tunnel is to the south, near the Fairview Fields #6 street art.

Update: If you don't find this flamingo outside, then you will find it in the underground tunnel. One of the entrances to the tunel is near the Frontera Hills #2 street art, and the other is south of the flamingo.