Are these springtails and isopods?

G’day!

I’m based in Victoria, Australia.

I’m hoping to culture springtails for my terrariums, so I went out and tried to collect some. I found them underneath a rock, which was sitting on damp ground. They certainly look like springtails, and gee they’re tiny! 1-2mm. But they don’t jump at all.

My first question is — is this little fella a springtail?

Fast forward a few weeks, and these little critters still seem to be alive in a jar. However, what I believe are isopods appear to have joined them. They’re super tiny though, < 2mm. And they’re always hovering around what appears to be eggs.

Here’s two pictures:

I read online about the lifecycle of isopods. They don’t lay eggs; rather, the mother keeps them in a pouch on her underside. I also read that, absent better food sources, they can feed on the eggs of other insects.

So what I suspect is, that these are springtail eggs, and the isopods are eating them. Is that a correct assessment? And are these indeed isopods?

Thank you in advance for your help!

TLDR

• Is the first picture of a springtail?
• Are the second/third pictures of isopods eating springtail eggs?