Nectar‐feeding birds provide an excellent system in which to examine form‐function
relationships over evolutionary time. There are many independent origins of nectarivory in …

Nectar-feeding vertebrates respond to variation in nectar sugar content by modulating
volumetric intake. In some nectar feeding animals, the intake response to sugar …

We measured levels of glucose and glycated hemoglobin in the blood of three of the world's
smallest nectarivorous birds, the Anna's (Calypte anna), Costa's (Calypte costae), and ruby …

As for other pollinators, hummingbirds have been classified as trapliners, that is, foragers
that repeat the order in which they will revisit several locations. Although the study of …

Examinamos el impacto en la variación de la calidad del hábitat en Colibríes migratorios
(Selasphorus rufus) en la Sierra Nevada de California. Estos pájaros, al igual que otras …

Although average nectar sugar concentrations in hummingbird-pollinated plants are low (20–
25% sucrose-equivalent sugars; mass/total mass), in choice tests birds have preferred …

We examined the feasibility of automating the collection of hummingbird mass data
facilitated by low‐cost, low‐power radio frequency identification (RFID) technology. In a field …

Competition for food can influence the coexistence of species via habitat selection, and
learned behavior can influence foraging decisions. I investigated whether learned behavior …

Several models for the economics of sociality demonstrate that the probability distribution of
an individual's resource consumption could depend on the size of its social group. When …

À cause de leur petite taille et des coûts énergétiques élevés du vol sur place et du vol
dirigé, les colibris ont les taux métaboliques spécifiques à la masse les plus élevés parmi …