Complex sentence: It lays one or two eggs, usually in a scrape, an area on the ground where a tern has made a small hole to lay its eggs, but in some cases tern eggs have been found laid directly on the ground, not in a scrape.
Split into simpler sentences: It lays one or two eggs, usually in a scrape, an area on the ground where a tern has made a small hole to lay its eggs. In some cases, tern eggs are laid directly on the ground, not in a scrape.