School groups, charter tours, or other groups of 15 or more must reserve Lincoln Home tours in advance by contacting the Springfield Convention and Visitors Bureau as soon as possible. School groups planning to visit in April, May or October should schedule approximately 6 months in advance.
Secondary consumers include reptiles, carnivores, small predators and insectivores. Animals at this level include different frog species, small snakes, large insects and birds of prey like eagles and vultures. Tertiary consumers include large snakes like the boa constrictor, and jaguar. Other large animals such as the Indian elephant or African forest elephant, gorillas or orangutans, and tapirs tend to feed on vines, fruits, or insects.
Third-level consumers are any organisms big enough to obtain energy by feeding off lower-level consumers. These are also called tertiary consumers. For example, in a forest ecosystem, snakes eat toads. Heron and large fish, such as bass and walleye, consume smaller fish, frogs and crayfish. Some ecosystems have four or more levels of consumers. Owls, high-level forest predators, go after third level consumers such as snakes and other smaller animals.