Tree Swallow nest

Recently, I posted a photo of a different nesting box, changing the ID from Mountain Bluebird to Tree Swallow nest. The previous photo had just one (maybe two) feathers. The photo today shows a far more typical Tree Swallow nest, with an assortment of feathers arranged in a circle around the eggs. These nests really are beautifully made. Normally, of course, I never get the chance to take photos looking into nests, and would never get that close to a nest even if I had the chance. When a person approaches a nest of any kind, you leave a trail of human scent, which can attract predators to the nest, so nest photos are always to be discouraged. However, I was kindly invited to go along on a friend's Bluebird route mid-June, so was able to hold my camera over the top of the wooden nesting box, hold my breath, and click. Meanwhile, Sue was checking the number of eggs, or young ones, and recording all the necessary information.