We discussed asking for photos of breeding evidence, ie. gathering nesting material, courtship, carrying food, feeding young, nestlings, carrying fecal sacs, fledglings etc.
It's a tricky subject and we don't want to encourage people to disturb nests in order to get a picture, but the information could prove useful if done in a respectful manner. (That shouldn't be a problem with members on this site.)
I'll look for more input from those involved in the MBBA as to what to look for and exactly what will constitute breeding evidence. As well as input from members.