Palo alto baylands park

My classmate came here for trying my 5DII, and brought his 70-200L2.8IS and x1.4extender.

We went to baylands park together for shooting birds.

location here if you are interested:

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My feeling:
1.Even 200mm with extender, not close enough.May need super Telelens for shooting birds, but no budget......
2.I'm not satisfied with the Image quality when using X1.4 extender.
3.5DII's focus system not bad.
4.next time, I'll go there early morning.

Gear: 5DII+70200L2.8IS+1.4Extender