Which is the smallest animal mentioned in Holy Quran?

Which is the smallest animal mentioned in Holy Quran?

قرآن پاک میں سب سے چھوٹا جانور کون سا ہے؟
Explanation

There are more than 200 verses in the Quran dealing with animals

The six chapters of the Quran are named after animals or insects:

1.      Surat 2, Al Baqarah (The Cow);

2.      Surat 6, Al Anaam (The Cattle),

3.      Surat 16, Al Nahl (The Bees);

4.      Surat 27, Al Naml (The Ants);

5.      Surat 29, Al Ankabut (The Spider);

6.      Surat 105, Al Fil.