The daisies do provide pretty good cover from the elements and screen the nest from passerby. I had this problem once before, when mourning doves set up in a planter outside my back door. They made a mess. These eggs are tiny and so pretty, I can't think of disturbing them but it will not be easy since this is the only practical means of egress from my house.
My neighbor thought they might be sparrows and from pictures I've seen online I think she is right. So it appears I've got guests for about a month. I'm going to have to rethink my door decor once they move out.
Hope you are having a nice weekend!