Alejandro Rico‐Guevara

This study identifies and quantifies intermittent hovering in hummingbirds, linking it to body mass, wing length, and wing coloration across species.

This study examines elevational variation in hummingbird flight muscle microanatomy across three sites in the Colombian Andes, finding differences in collagen fraction and fiber geometry.

This study reveals that sunbirds use intralingual suction to drink nectar, a unique mechanism not found in other animals.

This study compares nectar-feeding strategies between a generalist and a specialized bat species, finding convergent mechanisms but divergent efficiencies due to morphological and behavioral differences.

The paper identifies convergent and lineage-specific genomic changes in sugar-feeding birds through genome and transcriptome analyses, revealing adaptive mechanisms in metabolic pathways.

This study examines how dominance relationships in a hummingbird assemblage change over time, finding significant temporal variation in dominance, species composition, and visit frequency.

This study compares movement strategies of hummingbirds and flowerpiercers in high-Andean ecosystems, finding greater movement diversity in hummingbirds and flexibility in daily behaviors.

This study examines humeral shape evolution in hummingbirds, finding that biomechanical scaling and internal integration are primary drivers, with foraging ecology introducing secondary modifications.

This study examines bill dimorphism in male Green Hermits, finding males have sharper, more biomechanically efficient bills for stabbing during territorial combat.

This study tracks hummingbird movement using RFID tags and finds that traplining is not a consistent strategy, instead identifying three distinct movement types within a single species.

This study examines the impact of radio-tag backpacks on captive hummingbird behavior, finding no significant effect on core behaviors but noting covariates like treatment order and time of day influence activity patterns.

This paper develops a zero-shot learning computer vision method to estimate hummingbird wingbeat frequency from high-speed videos, achieving results comparable to human observers with minimal supervision.

This study investigates bill bending in hummingbirds during nectar feeding, finding that maxilla deformation enables efficient nectar exploitation in narrow flowers.

The paper introduces PicoCam, a 3D imaging system for live animals and preserved specimens, and demonstrates its use in measuring hummingbird bills with high precision.