tiny black and red insects

hello this morning i was looking at my budgies i have 8 budgies as i was looking i noticed that there were realy tiny red colour and black colour insects around the cage , under the cage and even on my wall they are so tiny you could hardly notice them unless u look at them very closely they are walking. what is worriying me is what are thety? are they becouse of the budgies? i keep them inside my home. they are on the wall im concernd tghey might even be on my sofas. what are they? how could i get rid of them and they dont come back. is there anything that i can use on my budgies.pleas give me good advice