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There are various selection pressures that may lead to sex being more or less harmful. I don't think there is an easy way to summarize these selection pressures other than just going through load of examples. Here is an attempt to give you some notions of why can sex be pleasurable and/or painful. Note that I do not consider myself particularly knowledgeable ...


This is not a hornet, this a wasp. See the yellow dots on the thorax ? They are typical of the Vespula genus. So is the yellow and black stripe pattern on the abdomen. Those wasps are smaller than hornets (1-2 cm for wasps, 3-4 cm for hornets). Picture from Wikipedia: There are two common Vespula species in France (V. vulgaris and V. germanica), but to ...


It's probably a white zebra finch:


It's some type of Reduviidae, or assassin bug - possibly a juvenile wheel bug. Here's a few pictures of Floridan assassin bugs I've found just browsing the net: Tagged as unidentified Reduviidae from Tallahassee Tagged as assassin bug Tagged as a Wheel Bug Tagged as a wheel bug nymph Bottom line: Not an ant, for sure: it's almost certainly in the ...


What you describe is called a ring species. From wikipedia: In biology, a ring species is a connected series of neighbouring populations, each of which can interbreed with closely sited related populations, but for which there exist at least two "end" populations in the series, which are too distantly related to interbreed, though there is a potential ...


It's a kind of hoverfly larva (don't know which one, maybe Episyrphus balteatus), they eat aphids on cabbages. Image on wiki commons


I'm sure the other answers play a part in this phenomenon aswell, but I was taught that worms do this because the worms dont have eyes, yet they still can sense light from dark, because staying out in the sun too long would dry them out, So they are between 2 yellow lines (to them they think that must be light) and the middle line is dark (the asphalt ...

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