I agree with Dewanand Makhan. This poison is very intense.

Thank you very much Kiran Rani

Shortage of males is not an issue, but insecticide could be

Thank you very much Damya Kareem

Thank you very much Andrew Paul McKenzie Pegman

Sure! They died out already long time ago.

I believe that the females only devour the males after they have mates with them. They have been carrying on like this for millions of years so it should not be a problem. insecticides and/or changing environmental conditions on the other hand could be much more problemati.

Arthropods are the largest group of eukaryotic organisms on this planet, with literally millions of species. Most of them mate once and then eventually die (semelparity). There are exceptions like many crustaceans, several groups of arachnids, or myriapods. In most insects and spiders, few males ever get to mate twice, and most will die shortly after mating. Given that after mating such a male is essentially an empty bag of protein to be wasted very soon, it is amazing that in only a few predatory species the females actually eat the males. It is indeed a rare exception. During mating, predatory instincts are generally switched off, which makes males generally get away in species with large sexual dimorphism. In those with similar sizes, cannibalism after mating is generally not an issue. Two well-known cases are praying mantids and black widows. In praying mantids, the males will escape most of the time, but just in case, the abdomen will keep mating after decapitation. Cannibalism is a function of the hunger of the female. In black widows, males will always be eaten after mating. i.e., there has to be some evolutionary advantage for them. And there is. The number of offspring is higher, when the male is eaten vs. removal.

Since all of the species in question mate and have offspring, it is not possible for them to die out due to cannibalism. Obviously, any population without offspring would disappear within one generation. The question of insecticides and human influence on ecosystems is probably best discussed in a separate thread.

Thank you very much James W Everts. Yes and some died out.

Thank you very much James Bonacum

Thank you very much Christof Stumpf

I agree with Christof Stumpf

It is possible to become extinct if poisons act and the population size is low. There are examples of insects in our fauna that have become extinct in the last 30 years. This does not mean that the species will become extinct globally throughout the entire range. One more point if the species reproduces parthenogenetically, it will not become extinct either, even if all males disappear. Regards, Sergey Viktorovich Pushkin

Thank you very much Pushkin Sergey Viktorovich

Thank you very much Mila Ilieva

Thank you very much Kiran Rani

Thank you very much Andrea Rossi

Thank you very much Basuki Wasis

Yes. This is to in order to provide food to the mating partner. The female eat the male while still copulating. The advantage to the male in this behaviour is contribution of spermatozoa to the next progeny

Thank you very much Kamal Kumar Gupta

No they will not die out. The female eat the male after mating which means in the next generation there are going to be new young males. By the way bees are doing the same, after mating the queen they chase the males from the bee hive and they die.

Thank you very much Jean-Pierre Jost

Thank you very much Nasser Said Gomaa Abdelrasheed

Thank you very much Majeed Rashid Zaidan

Thank you very much Shazia Tahira

Thank you very much Damya Kareem

https://www.nationalgeographic.com/animals/2018/09/praying-mantis-mating-cannibalism-birds-bite-facts-news/

Ruaa SH Redeiny thank you very much for the interested article.

Thank you very much Md Al Amin

No ... they will not die .... because this is the nature of these insects since God created them and therefore they are adapted to these things

Thank you very much Saef Alwattar

Thank you very much Thaer Dawood Salman

Thank you very much Rasha Majid Abd Ulameer Alhumairi

https://www.google.com/amp/s/api.nationalgeographic.com/distribution/public/amp/animals/2018/09/praying-mantis-mating-cannibalism-birds-bite-facts-news

Thank you very much Utsav Poudel

Thank you very much Afraa Ibrahim. That is a good one

Thank you very much Thomas Chabalala

Thank you very much P. Contreras

No, females of such species perhaps know that after copulation males will die.

Thank you very much Arbind K. Choudhary

Dear All. I stop answering in all my Questions. Wish you all good luck.

It's the cannibalism or neptual feeding behavior of some predatory insects.