FeralLiberal's cat Pippin got into some trouble with a nesting tree swallow, pictured below in a more tranquil moment, and I really appreciate his lending us these pictures for our Thursday bird moments.
The pictures are at http://www.flickr.com/photos/feralliberal
From my birder friends at Cornell; 'Cool fact: Tree Swallows are the only swallows that make substantial use of vegetable food such as seeds and berries. They favor bayberries. Eating berries when insects aren't available helps these swallows withstand bad weather, especially during their early spring return to the breeding range.' http://www.birds.cornell.edu/BOW/TRESWA/
Bayberries are a great candle ingredient, too. I will give up bayberry candles though, if it will help sustain the tree swallows.