Are they tough and fibrous? Looks like Marasmius oreades to me. But it's hard to tell from those pictures. The fact that the gills have been eaten on second of the first two pics doesn't help. Do not for a second think that i am suggesting you should eat them. I'm just saying what i think they look like for others to evaluate. What leads me to think that species is the broad umbo (on one of the bigger specimens) and the hygrophanous caps (which will fade to a creamy colour, losing all of the redness as they dry out), along with habitat and such. The very least you should do is spore print them, although that is not very helpful in this case because presumably it will be white spored and so will the things you would want to avoid. But it's good practice to do that anyway and in general because you never know.
For a more confident ID to be made, clearer pictures showing a better perspective (some further-away shots) and different stages of grown would be helpful.