A lot of birds mate for life, like barn owls, geese, bald eagles, golden eagles, condors, swans, brolga cranes, sandhill cranes, pigeons, prions (a seabird), red-tailed hawks, ospreys, and black...
No, they do not mate for life. They are a rodent and will breed with any other guinea pig. This ritual is reserved for noble animals such as the Bald Eagle.