Eye-Spy is correct, Ivy isn't nearly as neat as Trey was but even Trey couldn't keep the nestbox entirely clear of debris! Fortunately as the chicks get older and then after they leave, Mother Nature will start to clean out the feathers etc and by next spring, the box will be almost as pristine as this spring (they had new gravel this spring so it was cleaner in the box than it has been at the start of other nesting seasons). And of course we do go and check it out at the end of the season and before the birds get back next spring and its almost impossible to restrain ourselves from pulling out little bones leftover from the previous year's meals.