What is this bug and is it harmfull?

[slayerofpugz]

So i noticed this same bug i have killed over 10 of them in a day what arr they and will they kill my plant?

 

[Backlipslide]

I’m not sure what they are..

If you could get a close up of them, that would be helpful

 

[slayerofpugz]

I’m not sure what they are..

If you could get a close up of them, that would be helpful

After some Google time found out they arr know as leafhoppers they suck the life from yoir leaves so ya thwy are bad to have