Adult male spiders do not build webs.
Do only female spiders build webs?Females are the ones who usually build webs.It is generally accepted in the arachnological literature that adult female spiders build typical webs, while adult males do no web-building other than that required for courtship and sperm induction.
Adult male spiders do not build webs, instead they reserve their silk for mating. It is the female spiders that build the webs. This was known recently, however this was portrayed in the Quran 1400 years before it was discovered.
٤١ مَثَلُ الَّذِينَ اتَّخَذُوا مِنْ دُونِ اللَّهِ أَوْلِيَاءَ كَمَثَلِ الْعَنْكَبُوتِ اتَّخَذَتْ بَيْتًا ۖ وَإِنَّ أَوْهَنَ الْبُيُوتِ لَبَيْتُ الْعَنْكَبُوتِ ۖ لَوْ كَانُوا يَعْلَمُونَ
"It-takhatha اتَّخَذَ" is for males. "It-takhathat اتَّخَذَتْ" is for females. The Quran used "It-takhathat" for females. Here the female spider builds the web.
How could an illiterate man who lived 1400 years ago have known that webs are built by females?
Spiders build their webs to catch prey. But everytime they catch prey the web gets damaged or destroyed and the spider needs to rebuild it again.
14 incredible spider factsWind and rain damage their structure, while the gluey coating on the spiral thread that ensnares flying insects is rendered ineffective by pollen and dust. As a result the webs are often rebuilt every night - an operation requiring the manufacture of some 20 metres of silk.
It's the only creature whose house gets destroyed everytime it catches food. The web can even be damaged by wind alone. "But the most fragile of houses is the spider's house."
How could an illiterate man who lived 1400 years ago have known who has the weakest house?
The Quran (Koran, the book of Islam) contains scientific knowledge that could not have been known 1400 years ago. It ranges from basic arithmetics to the most advanced topics in astrophysics. You are invited to go through those miracles and judge for yourself.