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by imbnwa 1777 days ago
Can echo location be used for depth perception?
2 comments

Yes but it is very expensive. Here's some more on bats[0] (mentions expensive echolocation around 5:45 and moving from sonic location to echolocation evolution). Eyes do also convey more information. You can get colors in addition to depth and shape and that's a good reason and easy path for eyes to develop since light sensing is a pretty easy thing to develop. Also, bats aren't blind, despite common belief.

[0] https://www.youtube.com/watch?v=zWeYCULC0UQ

It can. One eye and echolocation gives you everything you get with two eyes except redundancy.

Cyclops got by with one eye and throwing rocks.