The boids have nothing compared to the Black Mamba and the "Asian" King Cobra. From my own experience, I find that the arboreal colubrids seem more aware of their surroundings. The most aware of those would be the boomslangs. Based on what I've seen and read.
The Herp Room
"The day I tried to live, I wallowed in the blood and mud with all the other pigs" - C. Cornell