[Augie]

This is what mine look like. They're on the smallish side like scallions, but they will develop a bit of a bulb if they're not crowded. I expect that you're correct about them being a variety of egyptian walking onion.

[MomwithHope]

They look exactly like mine although some of mine I let get big. Someone else said something about the greens not being edible. Not true for mine, the very young ones have edible greens very like a green onion and they are tubular shaped. When the onions are more mature like yours the green have a flat shape. Can’t take a picture they are snow covered. I like to peel and use the seed bulbs, some get as big as a small grape. That helps keep the population down.