Can kittens be twins?

There is a mean feral tortie that has invaded my babies space outdoors and she has 3 tiny kittens. There is a gray and black striped one (so adorable) and two that look just like their mother. From what I can see of them (without having my eyes scratched out) they have the exact same marking and both look like torties. Their color variations look to be in the same place. I don't know why they couldn't be twins but have never heard of this.

Its possible they are - especially if torties and having the markings in the same places. If they are not twins, they would have markings different from each other. It would be unusual to have matching markings on torties.

If you can get those kittens inside and take pictures, I'd love to see them. I've never had twin kittens, but when I was breeding dutch rabbits, I had a pair of twins. The only difference was one had the blaze tip cut off (not pointed) - but you had to look very close to even tell that. The other rabbits you could tell were different as their markings were a little different from each other. I don't know for sure if they were, but never had two bunnies that were that identically marked, so I guess they were twins.

I can't get close enough to them to tell completely. We have to look at the space by the washing machine outside (and then only if mom isn't there.). I'm dying to get ahold of all three of these babies but since they are still tiny and nursing, I don't want their mom to abandon them. - also it's kind of nice having all of my limbs and being able to see

If you can (and want to) get them at about 5-6 weeks old. After that you will have a much harder time trying to catch them and tame them down enough to be adopted.

We learned from our barn cats that you have to get them at this age and wean them earlier then normal.

I have had twins in 2 of my litters thus far (5 litters in 4 years)with my siberians (witnessed the same sack). Two were brown tabby boys and two were calicos.
Daisy

Actually, with calicos and tortoiseshell cats, even "identical" twins would not necessarily be identical. The color pattern occurs by random inactivation of one of the X chromosomes during the embryo's development. You can read a better explanation of the process here: http://www.messybeast.com/mosaicism.htm.

In Lexus and Tonka's 3rd litter, there were two kittens, a seal point male (now named Duke) and a seal point female (now named Pearl) who were twins. They shared the same sac and the same placenta. They were identical as kittens and looking at them now, unless you didn't know how to distinguish gender, you couldn't tell them apart.

So, in answer to your question, yes! It is quite possible for these two kittens to be twins.

in one of our litters years ago (China and Toulouse) we had to identical in markings and attitudes black and white vans. My mom ended up adopting both of them and to this day its hard to tell them apart