Was curious as a lover of the 3BP series, google gave me this:
"We've been sitting in our tree chirping like foolish birds for over a century now, wondering why no other birds answered. The galactic skies are full of hawks, that's why." (The Forge of God, Legend edition, 1989, pg 315).
The Forge of God and its sequel, Anvil of the Stars, are amazing books for anyone interested in the dark forest theory, by the way. A bit slow and contemplative, so you have to be in the right mood, but they're one of my favorite reads of the last few years.
I think there's a passage that even uses an analogy of a forest, though I'm not sure.
"We've been sitting in our tree chirping like foolish birds for over a century now, wondering why no other birds answered. The galactic skies are full of hawks, that's why." (The Forge of God, Legend edition, 1989, pg 315).
Yeah, same concept and even the same imagery.
Source: https://warwick.ac.uk/fac/sci/physics/research/astro/people/...