Go is like snakes: you're hatched from an egg and pretty much effective from the get-go. The older you get, the bigger prey you can eat, but otherwise things don't change much since you were hatched. Your species can thrive in almost any environment, you're effective, you have all the tools you need straight out of the egg.

Rust is like humans. There's a huge incubation period, and you're mostly helpless when you're born, but the older you get, the more effective you become with the tools nature graced you with. And you, like Thanos, are inevitable, even if it does mean the death of billions.

Python is like beaver. Everyone has an opinion about you: some think you're cute, some think you're wierd. You're perfectly suited to your environment, but things get awkward outside of your natural habitat - you can function, but not as well as when you're in your comfort zone. And when people encounter you where they're not expecting, they can be unpeasantly surprised, and you can cause them trouble.

C++ is like platypus. You resemble some other more simple, some might say sane, animal, but developed into a sort of frankenstein monster creature made from a jumble of parts and a stinger that, when it kills someone, comes as a shock. Every part of you serves some purpose, even if it seems tacked-on and out of place.

Then there's Node. You are everywhere. You are legion. You fill up ecosystems. People try to defend you, claiming that you serve some purpose in the foodchain, but there's scant evidence. Attempts to eradicate you fail. You often spread deadly disease. You breed, rapidly, persistently, relentlessly. You are widely hated, and yet everwhere.

Edit: typo