A graduate in Fine Arts, he served as curator and taxonomist at the Holguin´s Museum of Natural History Museum, contributing to the description of new species for science in Cuba and building a solid career in biodiversity research.

He is the author and illustrator of the Endemic Birds of Cuba, A Comprehensive Field Guide (2015) and the Annotated Checklist of the Birds of Cuba (2017–2026), both important references for the study and monitoring of Cuban avifauna. Nils coordinates international conservation projects and collaborates as an eBird editor and reviewer in Cuba, contributing to the quality and reliability of ornithological records.He was one of the pioneers and leading promoters of the birdwatching movement in Cuba.

As an artist, he has received numerous awards, including two City Awards and the National “Excellence in Art” Award, and has served as a juror in various exhibitions. He has also conducted workshops aimed at promoting and training new generations of wildlife illustrators and nature artists. His works are held in private collections in Cuba, Dominican Republic, the United States, Canada, England, Finland, and Mexico.

His birdwatching and nature tours are designed for experienced birders, enthusiasts, photographers, and travelers seeking an authentic and professional experience. Each itinerary combines strategic planning, up-to-date knowledge of birding locations, and a strong scientific approach, offering immersive experiences that integrate advanced identification, ecological context, and Cuban culture.

Nils is currently developing a new Field Guide to the Birds of Cubaillustrated with his own watercolors paintings, distinguished by high anatomical accuracy and refined artistic technique.

His purpose is clear: to study, illustrate, and promote Cuba’s natural richness with respect, scientific rigor, and a vocation for service.