The Border BioBlitz is a one-day communal citizen-science effort to record as many species as possible along a 1 kilometer stretch on each side of the U.S.-Mexico border. The Next Generation Sonoran Desert Researchers and collaborating organizations invite teams of independently organized teams of researchers and community members to document the stunning biological diversity of the borderlands at several key sites from Tijuana,CA to Brownsville,TX. To join the discovery, all you need is to join or start a team and a smartphone with the iNaturalist app (free for Android and iOS).
iNaturalist page:
https://www.inaturalist.org/projects/border-bioblitz