1,000 Volunteers Count Wildlife Along U.S.-Mexico Border

In a region better known for walls and wire, something beautiful is happening: a thousand volunteers are documenting wildflowers, rattlesnakes, and rare desert plants thriving along the 3,145-kilometer U.S.-Mexico border.

Border BioBlitz 2026 is a binational "community science" project running through April and May. Participants from both countries explore priority areas within 15 kilometers of the border, from the Pacific Ocean to the Gulf of Mexico, using the free iNaturalist app to photograph and catalog every species they find.

The project started in 2018 when volunteers logged more than 800 species at 11 locations. Since then, it has grown into a movement drawing roughly 1,000 participants annually who gather data in an environmentally rich but understudied region.

Recent observations include Southwestern speckled rattlesnakes, sweet clover root borer moths, and a rare mushroom-shaped parasitic plant called "sand food." Past editions have discovered Tecate cypress and carpets of common goldfields growing right against border walls, filling crucial gaps in biodiversity records.

Ciudad Juárez is hosting tours on April 18 and 26, sending residents into the Muleros/Cristo Rey range and along the Rio Bravo. Similar outings are planned from south Texas to Southern California and from Ciudad Juárez to Tijuana.

"It doesn't matter if you have experience or not," said Raymundo Aguilar, coordinator of Sierra de Juárez, one of the local partner groups. "Everyone is welcome. You just need curiosity and a desire to connect with nature."

The effort is led by the Next Generation of Sonoran Desert Researchers (N-Gen), partnering with the San Diego Natural History Museum and local conservation groups on both sides of the border. Participants only need a smartphone loaded with iNaturalist and a commitment to leave plants, rocks, and animals undisturbed.

The Ripple Effect

The volunteer work supports botanists who have named dozens of new plant species in the border region and used field data to advocate for protected areas. The project creates an open biodiversity database that scientists worldwide can access, turning casual nature walks into genuine conservation research.

Online leaderboards track who logs the most observations and which species appear most frequently, from towering saguaro cactuses to delicate California poppies. The friendly competition keeps volunteers engaged while building one of the most comprehensive wildlife surveys of the borderlands.

By focusing on what thrives rather than what divides, Border BioBlitz proves that nature recognizes no borders and neither should our efforts to protect it.