heres one more, the portias spider, also known as "proof positive to the nonexistence of a benevolent god."
firstly, she's fucking ghastly, I mean its impressive that a spider managed to look uglier than one that has evolved to look like actual shit, but this spider manages it, the portias spider is odd among the spider world in that its preferred prey are actually other spiders, conventional webmaking spiders at that.
she's also a jumping spider, and typically hunts spiders over twice her size.
they do this because she's probably the most intelligent spider known to man, portia spiders can determine the species of other spiders with the help of their absurdly potent vision and develop hunting strategies specially to deal with them, and we know they develop because portia spiders exposed to foreign spiders are able to develop countermeasures to deal with them specifically.
most portia's sneak up around or behind stationary mostly blind webweavers and replicate vibrations they've observed while watching these spiders to create a rhythm similar to that of a male of the species looking for a mate, then when the other spider comes to investigate the portia leaps atop the thing and messily devours it.
they've also been seen co-operating with others of their kind to take down larger spiders and share their meals, and they can actually recognise spiders they've met before by their webbing.
most people have their eyes on apes becoming the next dominant species, I'm watching for planet of the portia spider.
have fun sleeping tonight.