Spitting cobras (and a few other snakes) can spit their venom a few meters, aiming at the target's eyes in the hopes of blinding them, albeit the target may occasionally die, possibly from anaphylaxis. This is, however, a defense strategy; when hunting, they, like other poisonous snakes, inject their venom through their teeth. They could probably kill their victim from afar, but it doesn't appear that they do.
A spitting cobra and other snakes
(In a similar way, the bombardier beetle protects itself by spewing boiling-hot, poisonous chemicals at its adversary; however, this is for defense rather than prey killing.) However, I'm not sure if this will actually kill the attacker.)
We can look to the chimp for another "not quite." We know that chimps can and do use (and even create) weapons for hunting, including the well-known termite-fishing sticks as well as primitive spears for hunting tiny primates. We also know that they can hurl things and even prepare for it [A scientist claims that a chimp that threw stones at zoo visitors had a human feature]. To my knowledge, no one has ever seen a chimp toss pebbles (or any other projectile) for hunting purposes, and it's certainly plausible that no chimp has ever done so; nonetheless, if that behavior is observed, we have no reason to be astonished.
The bubble nets of humpback whales, the webs or bolas of spiders, the traps of ant lions, the lures of anglerfish, snapping turtles, and some snakes; and so on—all use traps to capture their prey from a distance, but then use more traditional means (like biting, or plain swallowing) to complete the kill.
There are also some examples of baiting through behavioural means, such as the heron who discovered that if tourists offered it bread, it could use the bread as bait to attract and catch fish; or a few predators that (rather surprisingly, I believe) attract prey by imitating them! Tigers, for example, are thought to imitate sambhar deer and black bears, both of which are tigers' prey. (You'd have to be a tiger to think "prey" when looking at any species of bear...) On a lesser scale, some glowworms use their light to impersonate females of other species, enticing and preying on amorous males.
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