Almost impossible to say! Are the three all the same bug? They all look different.
The first one just doesn't look right for a springtail, it could be an psocod nymph. They like moist places.
http://bugguide.net/node/view/...
The second one looks like a beetle, could be a root eating beetle ..
http://bugguide.net/node/view/...
Third one looks like a mature psocod, or barkfly.
http://bugguide.net/node/view/...
