In nature, courtship can be dangerous, and sometimes deadly. From insects that consume their mates to birds that perform precision dances, every ritual serves one purpose: survival of the species.

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An urgent call has gone out to save Buddy, a 6-year-old, 16-pound Miniature Pinscher and Chihuahua mix who needs a rescue commitment by the end of the day Monday to avoid euthanasia at the Castaic ...