Wildを付けても付けなくても[両方](https://eikaiwa.dmm.com/uknow/questions/39246/)猪という意味になります。
例：
I saw a wild boar yesterday.
昨日、猪を見ました。
Have you ever seen a boar before?
あなたは猪を見たことはありますか？
イノシシの学名はSus scrofa で、ユーラシア大陸に広く分布しています。日本のイノシシは少し違う種類なんじゃないかとも言われていますが、そのあたりは学問上の議論になります。
英語でイノシシの話をしたいときには、Japanese boar、あるいは wild boar と言えば良いでしょう。イノシシが増えていうのは
The number of wild boars is increasing in Japanese rural areas.
(日本の[田舎](https://eikaiwa.dmm.com/uknow/questions/36701/)ではイノシシの数が[増えている](https://eikaiwa.dmm.com/uknow/questions/44676/)）
They often come to fields and eat all of the vegetables.
(よく[畑](https://eikaiwa.dmm.com/uknow/questions/32110/)に来て野菜を食べてしまう。）
A) A boar
B) A wild pig
The wild boar, also known as the wild swine or Eurasian wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands.
I hope this helps :-)
A) A boar (イノシシ)
B) A wild pig (イノシシ)
"Wild swine"または"Eurasian wild pig"としても知られる "wild boar"はユーラシア、北米、そして大スンダ列島原産のイノシシです。
これがお役に立てば幸いです :-)
Another word for pig is swine. This is a a large, dangerous pig that is covered in hair and has two long curved teeth. It lives in the forests. The babies are called piglets.
For example: I saw wild pigs when I visited the zoo in Europe.
pig（ブタ）の他の言い方はswineになります。
これは毛に覆われて大きな長い曲がった歯を持つ大きくて危険なブタのことを指します。
彼らは森に住んでいます。
この子供はpigletsと呼ばれています。
例:
I saw wild pigs when I visited the zoo in Europe.
This animal would be called a "wild boar" because it is a boar and it lives in the wild-- or in nature.
You can also refer to pigs & boars as "swine." Additionally, "swine" is an insult that you can use to call someone dirty and disgusting. You can also use "pig," but "swine" is even stronger.
Also, calling someone "boorish" or saying that they display "boorish" behavior is saying that they are ill-mannered.
We could call it a wild pig/boar because it's not domesticated. Generally domesticated pigs are pink in skin colour and have light coloured hair.
Sometimes an uncastrated domestic male pig can be called a boar so maybe wild pig or undomesticated pig is best.
Wild boar---A wild boar is a large fierce pig which has two long curved teeth and a hairy body, and lives in forests.
--No one had said anything about hunting wild boar.
--In the wild she would live in northern China and learn to hunt deer and wild boar.
--In the oak forests, dogs forage for truffles and locals hunt wild boar.
wild boar(イノシシ)とは、2本の湾曲した牙に、ふさふさの体をした大きく獰猛な豚のような動物で、森に生息しています。
--No one had said anything about hunting wild boar.
イノシシ狩りのことに誰も何も言わなかった。
--In the wild she would live in northern China and learn to hunt deer and wild boar.
彼女は、中国北部に住んで、鹿やイノシシ狩りを習ったものだ。
--In the oak forests, dogs forage for truffles and locals hunt wild boar.
オークの森の中、犬はトリュフを探し回り、地元民は野生のイノシシを狩る。
The official term for this type of animal would be called a, "boar," however we can also refer to these animals as, "wild pigs," because they come from the same type of species as a pig that has not been domesticated by humans.
Examples :
We have many boars in the forest near my house.
Wild pigs can be very dangerous as they are not domesticated.
日本 
南アフリカ 
アメリカ合衆国 
オーストラリア 
イギリス 
