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Oology is a branch of zoology concerned with the study of eggs, especially birds’ eggs. Understanding birds’ nesting habits is an important part of this field, as egg features like shape and color have been linked to nest sites. For example, cliff-nesting birds lay highly conical eggs that are less likely to roll off, while hole-nesting birds tend to lay more spherical eggs. Birds that lay eggs in holes or burrows tend to have white eggs, and birds that build nests in trees lay what color eggs? Discuss
Source: The Free Dictionary