Culebra National Wildlife Refuge ¡Actualizada!12 Culebra may be the most precious jewel in the treasure chest of Caribbean refuges. More than 50,000 seabirds of 13 species find their way to this dot in the ocean every year to breed and nurture their young... Creado en Sun, May 13 2007. Actualizado en Sat, Oct 4 2008.