Small black bugs on Orange Tree soil.
I have a small Valencia orange tree and a dwarf navel orange tree in 22" pots. They're both about 3 feet tall and producing fruit (even though it's common place to find fruit in the dirt every morning). Lately I've noticed (I have to look very closely) these tiny black bugs cruising around the soil and the pot (not really on the plant itself). They MAY be winged creatures, but I'm not sure. They're smaller than a mosquito -- probably 1/4 - 1/2 the size. The majority of them are on the Valencia orange tree soil, but I've also noticed them on the navel pot and a few here and there on my other plants.
Like I said, they are hard to see unless I'm looking closely at the soil, but there seems to be a TON of them.
My question is... Does this ring a bell with anyone as to what these might be? Should I be concerned with these bugs and if so, what's the best way to get rid of them?
I water my orange trees once every 2-3 days usually. I use Miracle grow soil and organic citrus fertilizer.
Thanks in advance for any help!
-A worried gardener in Los Angeles