Palo Verde National Park was declared a Wildlife Refuge during the 1970s; over 60 different species of birds used the Laguna, or wetland, as a migratory stop. However, the introduction of Typha domingensis (southern cattail) has interfered with bird migration.
Palo Verde National Park was designated a Wildlife Refuge in the 1970s; a wide variety of bird species, exceeding 60, relied on the Laguna wetland as a crucial stopover during their migrations. Unfortunately, the introduction of Typha domingensis (southern cattail) has disrupted this vital process.