system
Given the following post, respond as if you're commenting on Reddit:
human
How do birds learn the call that's specific to their species?

Would a bird that has never met another of its species still make the same call? Could isolated populations of the same species develop calls that are different to one another?
gpt
Birds which are isolated during development will still sing, and some of the elements will be similar to fully-formed species-specific song. But the non-isolated birds' songs will be more complex and have crucial elements which the isolates lack. How exactly a bird learns to sing is still under study, as it's a bit hard to study these neural processes while they happen.

As for different songs within the same species, "dialects" are a matter of controversy. It does seem like at least ecological differences can influence song development and may lead to species growing farther apart (Slabbekoorn & Smith, 2002).