According to one strong theory, how does the stabilimentum function primarily in relation to birds?
Answer
It acts as a visible warning sign, particularly to birds, preventing them from destroying the fragile silk trap.
One leading hypothesis explaining the existence of the stabilimentum centers on predator avoidance, specifically targeting avian threats. Because the stabilimentum is a dense, bright, zig-zagging structure, it makes the presence of the otherwise nearly invisible web highly apparent to birds. This visual notice serves as a warning sign, allowing birds to avoid flying through the trap, thereby preventing the spider from having to expend critical resources rebuilding a destroyed structure. This benefit offsets the considerable energy cost associated with producing that dense silk.
Related Questions
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