Kill an adult male to get this. Afterwards, lower a female one to less than 10% (She won’t flee) and feed it to a large dino. Once this is done the female will impregnate the dino and make it request items. After a while a baby wasp will pop out of you dino (think xenomorph) and kill it. Claim it, raise it, and now you have a funny demon wasp.

Warning if you are not prepared to feed the dino cravings then the level of your dino and the mf you used to impregnate it won't matter as your juvenile rhynio will always spawn as a level 1 if you don't feed it any cravings.

Ark logic: you have to kill a guy rhyno to get this pheromone, then you feed this "Mating gland" to your favorite pet bronto or giga, then almost kill a mom one and watch as it "Reproduces" in it and your pet requests Gas, Element, or sweet vegetable cake, then watch your pet die as it gives labor and gets replaced for a baby death bug.

Mr Buff Guy at TranqDart mobile

You gotta kill this demon of the sky to get it

They do indeed spoil

About 6 hours in a preserving bin

A whole day in an argy (from what I tested)

And idk about fridge or in your inv since I didn't check

If you are using brontos, gigas, or carcharos to impregnate here's a fair warning that all 3 dinos listed above will run out of food faster than they can eat it (1 second per item eaten) so when their food reaches 0 they can starve to death despite having food in their inventory. To prevent this manually force feed it food until its hunger bar is full or if you're on singleplayer put a lot of food in it, leave your game and rejoin and the dino will have automatically eaten until its food bar is full or all the food in its inventory disappears. (This doesn't work on pc)

You get these by killing the rhyniognatha, kill low levels only to get these as the high levels are (obviously) better for impregnating your tames

They only drop from males so, net the bug, kill it grab the pheromone find a female net the female get it to less then 10% heath then let your Dino consume the pheromone wait for a pink glow on your Dino then it will fly away (hope this helps)

Do these spoil? Chat, do these spoil?

After you kill one of those you get this item, after giving this item to a medium or big sized dino they’ll get an effect for 5 minutes that will make it so every wild female Rhyniognatha will lay babies inside the dino and request items.

After giving it the items a baby Rhyniognatha will come out of your dino and kill it.

The baby will take stats from the Rhyniognatha who laid it and from your dino, the amount of stats that it’ll take from your dino is tied for the amount of items you gave it when it requested them.