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Credit: Matthias Kabel
Sure, the birds do it, and the bees do it, but do any animals go beyond procreation and stick together for life? Of the more than 63,000 vertebrate animal species in the world, monogamous relationships occur in just a small fraction. That tiny percentage includes the well-publicized faithful penguins and trumpeter swans, but also some creatures that are less cute and cuddly. Here are five examples from around the animal world that you may not know about.