![Damian Dovarganes Tijuana-based field botanist Mariana Fernandez of Expediciones Botanicas leads a botanical expedition with college students to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Flora and fauna that have gone extinct or are in danger of disappearing in the U.S. have been found to be thriving in remote spots south of the border, producing specimens that can then be used to bring back populations, scientists say. But the region's crime has deterred many U.S. scientists from crossing the border. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/1117edc3d441453d8940573f9fd43c7a/preview/preview.jpg?s=680x)
Tijuana-based field botanist Mariana Fernandez of Expediciones Botanicas leads a botanical expedition with college students to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Flora and fauna that have gone extinct or are in danger of disappearing in the U.S. have been found to be thriving in remote spots south of the border, producing specimens that can then be used to bring back populations, scientists say. But the region's crime has deterred many U.S. scientists from crossing the border. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare conservation project lead a botanical expedition with botanists and citizen scientists to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/8bdd0a3c5c8547d9b84cf8f045673904/preview/preview.jpg?s=680x)
Bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare conservation project lead a botanical expedition with botanists and citizen scientists to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Members of the Baja California's conservation Baja Rare project lead a botanical expedition with college students to document native plants along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. The group near the Mexican community of Jacume, about (60 miles) 100 kilometers east of Tijuana, is one of several participating in the Border Bioblitz in which more than 1,000 volunteers throughout May record as many species as possible along the U.S.-Mexico border, a region plagued by drug trafficking and migrant smuggling that has overshadowed its natural richness. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/578df53c71654763a46f451c80f051b1/preview/preview.jpg?s=680x)
Members of the Baja California's conservation Baja Rare project lead a botanical expedition with college students to document native plants along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. The group near the Mexican community of Jacume, about (60 miles) 100 kilometers east of Tijuana, is one of several participating in the Border Bioblitz in which more than 1,000 volunteers throughout May record as many species as possible along the U.S.-Mexico border, a region plagued by drug trafficking and migrant smuggling that has overshadowed its natural richness. (AP Photo/Damian Dovarganes)
![Damian Dovarganes College students, members of Baja California's conservation organization Baja Rare, lead a botanical expedition to document native plants along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate municipality of Baja Calif., Mexico. The Baja California peninsula, which borders California and is home to Tijuana, one of the deadliest cities in the world, has more than 4,000 species of plants. According to scientists, a quarter of them are not found anywhere else, and some 200 plants are considered rare with little to no protection. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/597e28dc69994e8c95867a0acea860ea/preview/preview.jpg?s=680x)
College students, members of Baja California's conservation organization Baja Rare, lead a botanical expedition to document native plants along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate municipality of Baja Calif., Mexico. The Baja California peninsula, which borders California and is home to Tijuana, one of the deadliest cities in the world, has more than 4,000 species of plants. According to scientists, a quarter of them are not found anywhere else, and some 200 plants are considered rare with little to no protection. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Dr. Georges Seingier, Prof. Marine and Environmental Sciences at Baja California Autonomous University leads a botanical expedition with Universidad Autonoma de Baja California botanists and citizen scientists to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Since then there has been a groundswell of initiatives to document the borderland's flora and fauna as climate change coupled with habitat loss, pollution and development have hammered the world's biodiversity, with one estimate in 2019 warning that a million plant and animal species face extinction within decades, a rate of loss 1,000 times greater than expected. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/86dd328994dc4d34842c2cdc3a21315f/preview/preview.jpg?s=680x)
Dr. Georges Seingier, Prof. Marine and Environmental Sciences at Baja California Autonomous University leads a botanical expedition with Universidad Autonoma de Baja California botanists and citizen scientists to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Since then there has been a groundswell of initiatives to document the borderland's flora and fauna as climate change coupled with habitat loss, pollution and development have hammered the world's biodiversity, with one estimate in 2019 warning that a million plant and animal species face extinction within decades, a rate of loss 1,000 times greater than expected. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Dr. Georges Seingier, Prof. Marine and Environmental Sciences at Baja California Autonomous University joins a botanical expedition with Universidad Autonoma de Baja California college students to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. The group near the Mexican community of Jacume, about (60 miles) 100 kilometers east of Tijuana, is one of several participating in the Border Bioblitz in which more than 1,000 volunteers throughout May record as many species as possible along the U.S.-Mexico border, a region plagued by drug trafficking and migrant smuggling that have overshadowed its natural richness. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/3c26fae38f01473b9faf74c34ad019ff/preview/preview.jpg?s=680x)
Dr. Georges Seingier, Prof. Marine and Environmental Sciences at Baja California Autonomous University joins a botanical expedition with Universidad Autonoma de Baja California college students to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. The group near the Mexican community of Jacume, about (60 miles) 100 kilometers east of Tijuana, is one of several participating in the Border Bioblitz in which more than 1,000 volunteers throughout May record as many species as possible along the U.S.-Mexico border, a region plagued by drug trafficking and migrant smuggling that have overshadowed its natural richness. (AP Photo/Damian Dovarganes)
![Damian Dovarganes A California Horned Lizard is temporary held for classification during a botanical expedition with Universidad Autonoma de Baja California college students documenting native plants and species along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the iNaturalist app on their smartphones are recording the biodiversity along the U.S.-Mexico border in May. Called the Border Bioblitz, more than 1,000 volunteers are recording as many species as possible. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/04f7f65b94bc424d9c87f84357cecd76/preview/preview.jpg?s=680x)
A California Horned Lizard is temporary held for classification during a botanical expedition with Universidad Autonoma de Baja California college students documenting native plants and species along the U.S.-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the iNaturalist app on their smartphones are recording the biodiversity along the U.S.-Mexico border in May. Called the Border Bioblitz, more than 1,000 volunteers are recording as many species as possible. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare project lead a botanical expedition with college students to document native plants along the US Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/0cd4ae71cfe54f13a5a2b3544ce4ae4b/preview/preview.jpg?s=680x)
Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare project lead a botanical expedition with college students to document native plants along the US Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Horses walk close to the US Mexico border Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the iNaturalist app on their smartphones are recording the biodiversity along the U.S.-Mexico border in May. Called the Border Bioblitz, more than 1,000 volunteers are recording as many species as possible. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/ac37d90d4b824848bd263381d9146259/preview/preview.jpg?s=680x)
Horses walk close to the US Mexico border Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the iNaturalist app on their smartphones are recording the biodiversity along the U.S.-Mexico border in May. Called the Border Bioblitz, more than 1,000 volunteers are recording as many species as possible. (AP Photo/Damian Dovarganes)
![Damian Dovarganes A college student joins members of the California's Baja Rare conservation project leading a botanical expedition to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. Since then there has been a groundswell of initiatives to document the borderland's flora and fauna as climate change coupled with habitat loss, pollution and development have hammered the world's biodiversity, with one estimate in 2019 warning that a million plant and animal species face extinction within decades, a rate of loss 1,000 times greater than expected. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/425034f206cf48f4a0ed133f5386434a/preview/preview.jpg?s=680x)
A college student joins members of the California's Baja Rare conservation project leading a botanical expedition to document native plants along the U.S.- Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. Since then there has been a groundswell of initiatives to document the borderland's flora and fauna as climate change coupled with habitat loss, pollution and development have hammered the world's biodiversity, with one estimate in 2019 warning that a million plant and animal species face extinction within decades, a rate of loss 1,000 times greater than expected. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire along the US Mexico border on Friday, April 19, 2024, near Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare project lead a botanical expedition with college students to document native plants along the US Mexico border on Friday, April 19, 2024, near the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/b81b462858aa4c48aec9bd1a57ae2eaa/preview/preview.jpg?s=680x)
Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire along the US Mexico border on Friday, April 19, 2024, near Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire as members of the California's Baja Rare project lead a botanical expedition with college students to document native plants along the US Mexico border on Friday, April 19, 2024, near the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)
![Damian Dovarganes Lichen grows on native tree branches along the US-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the mobile cellphone iNaturalist app are recording the biodiversity along the U.S.-Mexico border in May. The Border Bioblitz has more than 1,000 volunteers recording as many species as possible. Flora and fauna that have gone extinct or are in danger of disappearing in the U.S. have been found to be thriving in remote spots south of the border, producing specimens that can then be used to bring back populations, scientists say. But the region's crime has deterred many U.S. scientists from crossing the border. (AP Photo/Damian Dovarganes)](https://mapi.associatedpress.com/v2/items/9379d4bbc83247678d230b1cd41fda90/preview/preview.jpg?s=680x)
Lichen grows on native tree branches along the US-Mexico border on Friday, April 19, 2024, in the Ejido Jacume in the Tecate Municipality of Baja California, Mexico. Botanists and citizen scientists armed with the mobile cellphone iNaturalist app are recording the biodiversity along the U.S.-Mexico border in May. The Border Bioblitz has more than 1,000 volunteers recording as many species as possible. Flora and fauna that have gone extinct or are in danger of disappearing in the U.S. have been found to be thriving in remote spots south of the border, producing specimens that can then be used to bring back populations, scientists say. But the region's crime has deterred many U.S. scientists from crossing the border. (AP Photo/Damian Dovarganes)