Amazing ingenuity possessed by some animals, such as wolves, flies and spiders. Wolves, when in hunger and not able to hunt for any food, would pretend to be dead. By inflating its abdomen, the birds would thought that it was dead and so went down to eat the carcasses. This will be the golden opportunity for the wolves to have its food. Lets not forget about the sophisticated and intrigued spider, who nets a trap, sits comfortably in the middle of the web waiting for its prey. Once a mosquitoe or flies are trapped, quickly the spider jumped and suck their blood. Spiders are built this way, to hunt with nets and traps.
Do not underestimate the lesson from something that looked and sounded trivial, like the mustard seed or even mosquitoes. The wisdom, the meaningful reasoning can be drawn from something that’s seems trivial. By underestimating the lesson, the wisdom behind every single creations is the legacy of those who refused to accept why Allah Subhanahu Wa Ta'ala explained reasoning behind each creation by comparing the life of the flies, spiders, dogs, donkeys, until Allah Subhanahu Wa Ta'ala revealed this in Surah Al – Baqarah, verse number 26.
"Verily, Allah is not ashamed to set forth a parable even of a mosquito or so much more when it is bigger (or less when it is smaller) than it. And as for those who believe, they know that it is the Truth from their Lord, but as for those who disbelieve, they say: "What did Allah intend by this parable?" By it He misleads many, and many He guides thereby. And He misleads thereby only those who are Al-Fasiqun (the rebellious, disobedient to Allah)."
What an abundance of hikmah hidden behind the creations of these animals mentioned, of which we often takes as of no importance. How many dalils or texts that explains about the Creator Himself, about His Mercy and His Wisdom. And ask these to the non-believers, Who have given these animals such intelligence, such act to even catch a prey, let alone their survival with such little strength? None other than Allah, the Most Gracious, the Merciful and the One who Notifies. - Ibn Qayyim Al-Jauziyyah, Miftahu Daris Sa’adati, Juz 2, 1416H/1996 M: 153-154)
Narrated by Abu Hurairah radi'Allahu anhu Rasulullah sallallahu alaihi wasallam said, "When a fly perched on a drink of one of you, let it sink into the drink, because on one of its wings it carries a disease and on the other has its cure." – Hadith Riwayat Al-Bukhari.
This explanation is further supported by another authentic source of hadith. Narrated by Abu Sa'eed al - Khudri , the Prophet sallallahu alaihi wasallam said, " On one of the fly’s wings lies the poison and the other has its cure. Therefore, when it fell on the food, then sink it into it, for when the fly perched on the food, it’ll let go of the poison first and follows by the antidote." – Hadith Ibn Majah. ( Abu Anas Majid, Sahih At-Tibbi An-Nawawi fi Dhaw’i’l Kitabi wa As-Sunnati wa Aqwali As-Salafi, t.t. 119)
Al- Haramain, Tafseer and Terjemah, pp 5-6.