A few examples of this would be sticky traps for flies/wasps or ones for rats even.
Why would a wasp, for example, fly onto a sticky pad trap that has 30+ other (mostly dead) wasps on it already? Surely at some point the incoming wasps would see it’s buddies either dead or helplessly trying to get unstuck, and think: “maybe something is wrong here”. But they don’t… Are they really that dumb?
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There’s a biology theory (aka observed but challenging to ‘prove’ outright) that most ‘lower’ animals and certainly most insects don’t recognise others, even others of their own species, as ‘same as me’. So a fly would see another fly, maybe even one hatched from the same mother, and not even recognise the other as ‘oh that’s also a fly!’
So they don’t see a fly trap with lots of flies as ‘oh no! My brother Jerry and my 2nd cousin once removed Tania are in a glue trap, I better not go there’. they simply smell a great smell and see a flat surface and land on it to look for the food.
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