To make it fun, consider coming up with a series of photographs showing how the hens go through the broody cycle. The pictures can show things like nest construction, what the broody hen looks like on and off the nest compared to non-broody hens, etc. I you have gaps in pictures needed then possibly others can provide them to help complete the story. The elaborate with a little description for each picture. You will be biting off a lot with such a project.
Your title says "broody chickens" which leaves open door for role of rooster. Want some images of rooster action? We can wait so as not to dilute thread. The broody stuff is fun for me too and I have time because trapped at home by weather. One of my American Dominiques just went broody. Before I bust up her nest some pictures can be taken.