Flexi Says: The altricial strategy is used by robins. These birds hatch helpless and naked, completely unprepared for independent life. Parents invest little energy in just a few, small eggs. However, survival of these offspring matters a great deal, because there are so few. So, parents build elaborate nests safely hidden in trees and invest a great deal of energy hunting for food around-the-clock until the young have developed enough to fledge and find food on their own. Amphibians such as frogs generally lay large number of eggs. Often, many adults lay eggs in the same place at the same time. This helps to ensure that eggs will be fertilized and at least some of the embryos will survive. Once eggs have been laid, most amphibians are done with their parenting.