Insect and Spider Identification: [Los Angeles] can\'t identify these bugs living in my hamster\'s cage, 0 by tintomtit

tintomtit wrote:
A week ago, when I was cleaning the cage of my 1 year old hamster, I accidentally noticed these very-very little bugs running all over the bottom of the cage. Some of them had white color and some of them dark. And because I\'m nearsighted I saw them when I was cleaning the litter. I\'m afraid these bugs are dangerous to the hamster. I have a terrarium with the gecko near the hamster cage, and inside the terrarium lives spring tails, and I thought maybe they somehow get off the terrarium (!but they need a wet ground to live), and then I googled the high resolution photos of the spring tails and they are different from what I saw in the cage. Help me to identify them, please.