During breeding season, Bluebirds in Iowa experience both extreme cold, and extreme heat. This April was the coldest in Iowa history. Mother bluebird delayed egg #4 by a full day, due to cold wet conditions. These eggs laid in this box during freezing temperatures, and all still hatched at exactly 14 days! What a blessing!
Harold R Spencer Bluebird TrailIowaBluebirdNest boxremote camera