در روایتی از پیامبر اکرم صلواتاللهعلیه، ایشان میفرماید: « خداوند متعال، جن را به پنج صنف و گروه آفریده: گروه اول، مانند باد در هوا هستند. گروه دوم، مانند مارها هستند. گروه سوم مانند عقربها هستند. گروه چهارم مانند حشرات هستند. گروه پنجم مانند انسانها هستند ».

جنیان، جسم لطیفى هستند که امکان دیده شدن آنها، به طور مطلق بدون اختصاص به گروه یا نوع خاصی وجود دارد. این رؤیت و دیدن نیز اختصاص به فرد یا افراد خاصی از قبیل پیامبران یا امامان(ع) ندارد، بلکه همهی افراد بشر در صورتی که جنیان، خودشان را ظاهر کنند میتوانند ببینند.حال چه اینکه خودشان را به صورت انسان ظاهر کنند یا به صورت همان حشرات… بنابر این، ممکن است برخی از مارها و حشراتی را که میبینیم در حقیقت، افراد جن باشند.
Jinn also aren’t isolated to Islamic culture alone. The concept of a Jinn preceded Islam, and was simply incorporated when the religion came about.The earliest evidence of the word, can be found in Persian, for the singular Jinni is the Avestic “Jaini”, a wicked (female) spirit. Jaini were among various creatures in the possibly even pre-Zoroastrian mythology of peoples of Iran.
The belief in spirits was prominent in pre-Islamic Bedouin religion. However, there is evidence that the word jinn is derived from Aramaic, where it was used by Christians to designate pagan gods reduced to the status of demons, and was introduced into Arabic folklore only late in the pre-Islamic era.
So in the same way that European pagan Gods like Pan were personified as demons when Christianity became a central religion, many ancient Middle Eastern spirits of folk-lore became relegated to Jinn once Islam became a dominant religion. However, instead of making all these beings completely evil as Christianity did, it seems that the Jinn —while mainly evil —do have a bit of a more nuanced nature, in that they have free will.
Animals can be divided into five distinct groups: mammals, fish, birds, reptiles, and amphibians.
Muslim jinn are usually thought to be benign, Christian and Jewish jinn indifferent unless angered, and pagan jinn evil. Other common characteristics include fear of iron and wolves, generally appearing in desolate or abandoned places, and being stronger and faster than humans.
Jinns are also believed to take on the form of different animals, in particular, black dogs. Hence, dogs are able to perceive them more commonly than us humans. Arabic folklore also suggests that Jinns take on the form of multiple creatures at the same time, a sort of half-human, half-animal hybrid.
Sūrat Al- Jinn 72 reveals that there are categories of Jinn: believers, disbelievers, misguided and guided. There are of different categories of Jinn including Aamar, Arwaah, Shaytan, Maarid and Ifreet.
Although generally invisible, jinn are supposed to be composed of thin and subtle bodies (Arabic: أَجْسَام, romanized: ʾajsām), and can change at will. They favour snake form, but can also choose to appear as scorpions, lizards or as humans. They may even engage in sexual affairs with humans and produce offspring.
In Islamic teachings, on the day of reckoning, all creatures will rise up and have justice for any wrong that was done to them, including animals. However, only humans and jinn will be judged on their actions and go on to the afterlife.

It is mentioned in Sunni books like Bukhari Vol 11 : (Donkey sees Shaitan) but I did not find it in our authentic books.
Nevertheless, what difference does it make for us in our worldly and religious life whether it is true or not?
The world of Jinns is completely different world frm ours and we ae not allowed to seek any help from them as we read in Quran (And some men from humans were seeking refuge of the Jinn and the Jinns added on their hardships)(Al-Jinn ; 6).
Nasnas
The nasnas is a weak form of a Jinn-Human hybrid.It is described in The Book of 1001 Nights as a half- human being. It has half a head, half a body, one arm, one leg. It hops about on its single leg.Also, in Somali folklore there is a creature called “xunguruuf” “Hungruf” which resembles the “nasnās” as it has the same characteristics and features. It’s believed it can kill a person by just touching them and the person would be fleshless in mere seconds.
Palis
The palis is a vampiric foot-licker that lives in the desert. It has low intelligence and can be easily outwitted, according to lore. It attacks sleeping people and drains their blood by licking the soles of their feet. It can be fooled by two people sleeping end to end with their soles of their feet together or under each other’s head.

Shiqq
The shiqq is a lower form of djinn, a half creature,or literally only half-formed and thus monstrous in appearance. Muḥammad al-Qazwīnī included Kabandha, the creature from the Southeast-Asian epic, Ramayana, as a Shiqq Jinn.
Si’lat
The si’lat are expert shape-shifters and the smartest of the djinn. They can mimic human appearance with ease.
Shaitan
In Islam the Devil is known as Iblīs (Arabic: إبليس, plural: ابالسة abālisah) or Shayṭān (Arabic: شيطان, plural:

شياطين shayāṭīn). In Islam Iblis is a jinn who refused to bow to Adam (ʾĀdam). The primary characteristic of the Devil, besides hubris, is that he has no power other than the power to cast evil suggestions into the hearts of men, women, and jinn. Although the Quran does mention appointing jinn to assist those who are far from God in a general context. “We made the evil ones friends (only) to those without faith.”
The shaitan (shaytan) is a rebellious, malevolent Jinn associated with demonic forces
now, Let's listen to some wolf howls.
- The sound of a wolf in the forest
- simple Wolf howl in darkness and moon
- The loud howl of a wolf in the desert
- The terrifying howl of a wolf during a defense
- 4 different howls of a tired wolf after a relative calm
- Wolf Packs Howling Compilation
- The special sound of a wolf when it becomes aware of its surroundings
- The terrifying sound of a wolf in the forest
بعضی از حیوانات همچون خروس سفید ، کبوتر و اسب اصیل موجب هراس اجنه می شوند و چنانچه در خانه ای اسب اصیل وجود داشته باشد جن ها جرات وارد شدن به آن خانه را ندارند.
همانطور که اشاره شد اجنه بسیار زیادی از کبوتر دارند بالاخص اگر این کبوتر به رنگهای سفید و دورنگ باشند. در روایتی از امام صادق علیه السلام آمده است:«هر منزلی که کبوتر داشته باشد جنی نمیتواند به آن خانه آفتی برساند»

خروس سفید از دیگر حیواناتی است که جنیان هراس بسیار زیادی از آنها دارند چنانچه خانه ای از این حیوان داشته باشد اجنه نمی توانند به آن خانه ورود کنند. همانطور که در حدیثی از امام صادق علیه السلام آمده است:«اگر در خانه ای خروس بال گشاده سفید وجود داشته باشد هم خود آن خانه و هم هفت خانه اطراف آن از بلا به دور می ماند و یک بال زدن کبوتر دورنگ خیلی بهتر از هفت خروس سفید است»
نزد گرگ ها ازدواج و جفتی با محارم نیست یعنی گرگ با مادر و خواهر خود زناشویی نمیکند، چنانچه که دیگر حیوانات دارند .
نزد گرگ ها وفا داری به زوج خود نظیری ندارد ، یعنی یک گرگ نر با یک گرگ ماده ازدواج میکند و بس . ودر طول زندگی به آن خیانت نمیکند و همچنین گرگ ماده به شوهر خود خیانت نمیکند.
جن به شکل حیوانات دیگر همچون شیر،گربه،سگ،مار ، گوسفند و ازجمله انسان هم در می آید. یک دانشمند از عربستان سعودی به یاد می آورد که در زمان کودکی،در روستای زادگاهش مردم تصور میکردند که جن ها پیوسته "به شکل خرگوشها، کودکان و حیوانات" در روستا رفت و آمد میکنند
ولی مسئله در تشبیه به خر، پراهمیت تر است.چون عرب به طرز گسترده باور دارند که وقتی جن ها به شکل انسان در می آیند پاهایشان نه به شکل پای انسان بلکه به شکل پای خر است.بنابراین جن انسان نما در ظاهر انسان ولی در باطن خر است.دشمن عمده ی خر در کشورهای عربی گرگ است.بنابراین تعجبی ندارد که دشمن جن نیز گرگ تلقی شود.به عقیده ی اعراب، نه تنها گرگ جن ها را میخورد بلکه جن ها چنان از او وحشت دارند که مردم قبایل بدوی همواره با خود، استخوان یا دندان یا پوست گرگ را حمل میکنند تا جن از آنها فاصله بگیرد.
Jinn are further known as gifted shapeshifters, often assuming the form of an animal. In Islamic culture, many narratives concern a serpent who is actually a jinni. Other chthonic animals regarded as forms of jinn include scorpions and lizards. Both scorpions and serpents have been venerated in the ancient Near East.