The enzymes that act inside the small intestine are amylase, protease, and lipase. Amylase acts on starch and breaks it down into small carbohydrate molecules. Protease acts on proteins and breaks them down into amino acids. Lipase breaks down dietary fats into smaller molecules called fatty acids and glycerol.
Sandhill Cranes mate for life, choosing their partners based on dancing displays. Displaying birds stretch their wings, pump their heads, bow, and leap into the air. Although each female usually lays two eggs, only one nestling typically survives to fledge.
The birds, with an average height of 3 to 5 feet and a wingspan of 5 to 6 feet, spend the night in the Platte River, so look for them flying over or roosting on the river at sunset and sunrise. The birds boast red skin on their foreheads and crowns, and adults have whitish cheek patches.andhill cranes do not reach sexual maturity until they are 3 to 5 years old; in the wild they can live to be more than 25 years old. Once on their nesting grounds, the pair builds a ground nest and the female lays two eggs.