Derpling

Derpling spawns on the surface Jungle when Hardmode is activated. It seems to spawn during the daytime. This buglike monster jumps high and attempts to land on you. It can strafe to the sides in midair, making it a pain to deal with. One is advised to deal with them quickly, as they spawn fast and can easily overwhelm you.

They are immune to the Confused debuff.

Trivia
Herp derp shaghetti unicorn!!!!!!!
 * The Derpling has a Crimson counterpart, named the Herpling.
 * The Derpling and the Herpling are references to the meme "Herp Derp".

Bug

 * Sometimes the Derpling will jump through walls and still move like normal, except slower

Tips

 * Using a weapon with a long reach (i.e Fiery Greatsword) allows you to keep these monsters away. Having an item to increase knockback can also be helpful.
 * Ranged weaponry is a good idea, especially in early hardmode, as they can deal a lot of melee damage very quickly, particularly to less well equipped players.