Ornithologist Gerardo Marrón Explores Baja’s Unique Birdlife

On a quiet October evening in 2025, ornithologist Gerardo Marrón and a team of scientists embarked on a biodiversity expedition in the Sierra de las Cacachilas, located southeast of La Paz, Baja California Sur. Their mission was to observe the region’s wildlife, particularly the elusive elf owl, the smallest owl species in the world, measuring just 5 inches tall. As the sun set, Marrón used a combination of pre-recorded bird calls and his vocalizations to attract these fascinating creatures.

Marrón is not only an accomplished ornithologist but also a research coordinator for Pronatura Noroeste, a Mexican environmental organization collaborating with the San Diego Natural History Museum. At 39 years old, he has dedicated nearly two decades to studying the diverse bird population of Baja California Sur, which boasts over 400 species. His work aims to bridge the gap between scientific research and community engagement, particularly focusing on educating young people about the environment.

Fostering a Love for Science

Beyond his fieldwork, Marrón recently organized a Christmas bird count in Las Cacachilas, emphasizing the importance of involving local communities in scientific activities. He believes it is essential to “fill the holes” in the research landscape of Baja California Sur, a region often overshadowed by its renowned beaches and marine biodiversity.

Elf owls are relatively common in Baja California Sur but are classified as endangered in California. The significance of spotting one during the expedition brought a sense of excitement to Marrón and his colleagues. The group shared a moment of hushed joy when they finally glimpsed one perched in a nearby tree, a testament to the region’s unique biodiversity.

In a recent interview, Marrón reflected on the origins of his passion for nature. Growing up, his parents nurtured a connection to the natural world; his father hailed from a ranch, while his mother grew up in a fishing community. Marrón’s curiosity about nature blossomed in childhood when he began investigating the behavior of ants in his backyard.

A Journey into Ornithology

His formal introduction to birds came at the Autonomous University of Baja California Sur, where he initially studied marine biology. A field trip to Guerrero Negro sparked his fascination with birds and their habitats. Marrón’s first visit to Guerrero Negro was transformative, as he witnessed thousands of shorebirds and hundreds of ducks, igniting his desire to explore the field further.

Marrón’s enthusiasm for his work is palpable. He described his favorite aspect of ornithology as the thrill of exploration. “There are many places in Baja California Sur that have not been touched,” he noted. “All my life has been about exploring.”

His experiences extend beyond simply observing birds; he has had the opportunity to study a variety of species, including the marsh sandpiper and the sharp-tailed sandpiper, the latter being only the second of its kind recorded in Mexico. Each encounter deepens his appreciation for these creatures, particularly owls, which he finds captivating.

Marrón explained that while ornithology is grounded in scientific methods, birdwatching allows for a more personal connection with nature. His philosophy is that birding encompasses a wide range of activities, from casual observation to more focused scientific inquiry.

As part of his efforts to engage younger generations, Marrón emphasized the importance of making science accessible. He aims to instill a sense of possibility in children, particularly those in communities outside La Paz. He encourages them to explore their environment and consider a future in science. For instance, during a recent expedition, Marrón highlighted the discovery of a new species of spider in the Cacachilas, inspiring local middle school students by showing them that they could make similar discoveries in their own backyards.

Marrón’s dedication to fostering curiosity in the younger generation is evident in his work with Pronatura Noroeste. By creating educational programs and opportunities for hands-on experiences in nature, he is helping to cultivate a new generation of environmental stewards.

In summary, Gerardo Marrón’s lifelong exploration of nature, particularly the avian diversity of Baja California Sur, reflects his commitment to both scientific research and community engagement. His efforts to inspire young people to appreciate and participate in scientific exploration are vital for the future of conservation and biodiversity.