Birds Change Their Priorities as Summer Progresses
Nest-building and raising nestlings start in the springtime and continue into the summer for most birds that visit feeders. Although this entire process can be completed in a month's time, the losses due to predators, disease, or weather often require songbirds to make several breeding attempts prior to successfully raising young. Despite these setbacks, many are able to raise two or more broods by mid-summer. It's hard work to find enough food to support the rapid growth of nestlings. Defending the nest against predators takes a lot of energy, too. The wear, tear, and stresses of producing and rearing the young must eventually be repaired. This repair cycle usually takes place in late summer when tattered feathers are replaced, the immune system is rejuvenated, and nutrient stores begin to be replenished.