The picture shows a Geranium Robertanium. In German: Ruprechtskraut and stinking cranesbill. It is the only geranium species that turns red. And when you pluck it out, a strong, sometimes unpleasant, odor emerges.

The yellow one is called Ranunculus ficaria. I think celandine is Chelidonium majus. What do you think about it ?