No different to most pop music.

And allergies are because your nose is full of tree jizz

TIL this waterfalls want to get nasty

Yes and no. A lot of the sounds are mating calls, but there's so much more being communicated.

Some sounds are warnings, like when squirrels see a cat and start to chirp. If you watch them, you'll see them run up a tree and pause upside down on the trunk, chirping an alert to others. Other squirrels in the area will repeat the behavior and amplify the "message" until the threat (the neighborhood cat) goes away.

Some sounds are intended to trick others. Blue jays mimic the sounds made by birds of prey in order to scare other birds away from their feeding grounds. It works really well - I've seen a jay clear a whole flock of starlings from my yard before. He then swooped down and plucked a bunch of worms and bugs from the soil.

There's probably more, but these are just examples I've observed while hanging out on my porch.

Birds are generally saying one of two things: "Fuck you," or "Fuck me."

Enjoy it before Zuck sucks all that water out to cool the computers that bring you Italian brainrot animals and Turbodong 2000 videos.

the sound of millions of animals desperately trying to get laid

And yet when I do it, I'm a pervert and asked to leave the park.

Some are also like "Fuck off, this is my tree!"

Yeah, still WAY better than listening to traffic and incessant car noise?

That just makes it all the more beautiful, to be honest.

Sometimes the sound is the animals actually getting laid.

This meme implies that birds and insects are not animals

They should just get tinder accounts and stfu.

The Girl Who Could Talk to Birds

If you really boil it down, all that any species ever does is in some way an attempt to propagate its genes. We aren't any different either. The artistic spark that got Davinci to paint the Mona Lisa was there due to such behaviour being an evolutionarily beneficial trait (being good at art increases the social standing of a person and thus increases their chances of reproduction). I don't want to sound cynical about this because I'm not. That's just life. It really doesn't matter. The painting is still beautiful.

Well, big same, ya know?

Outside of mating season, birds definitely do sing just for fun.

And even in mating season, I wonder if birds really consciously try to "get laid" or if they just sing, because it feels like the right thing to do in the moment and then getting laid happens. I mean, some start singing very young. How would they know what it's for the first time? Not all birds are as smart as crows.

This review paper looks at the motivation for both kinds of singing: intrinsically motivated (just for fun, all year round) and singing that attracts mates. In the latter, it's unclear, what triggers the motivation. The author supposes, it might be a combination of socially reinforced behavior and the vicinity of a mate, rather then the act of copulation, that triggers the reward.

Or trying to kill each other at lunch time

The hills! They’re alive!!

Or a meal