Animals display surprising romantic behaviors. Albatrosses and foxes mate for life, while wolf eels form long-term pairs.

Liz Bonnin sets out to explore how animals meet, mate and in some cases form lifelong relationships, shining a light on the extraordinary emotions that it seems animals are capable of.

Animals also choose their mates, sometimes with a great deal of care. Mating systems are important to understand because they reflect the result of natural selection on mate choice, and ultimately ...