Vertebrates obtain social information about predation risk by eavesdropping on the alarm
calls of sympatric species. In the Holarctic, birds in the family Paridae function as sentinel …

Procellariiform or 'tubenosed'seabirds are challenged to find prey and orient over seemingly
featureless oceans. Previous studies have found that life-history strategy (burrow versus …

Two main models have been proposed to explain how the relative size of neural structures
varies through evolution. In the mosaic evolution model, individual brain structures vary in …

Visual systems of open habitat vertebrates are predicted to have a band of acute vision
across the retina (visual streak) and wide visual coverage to gather information along the …

Several species of the most diverse avian order, Passeriformes, specialize in foraging on
passive prey, although relatively little is known about their visual systems. We tested …

Little is known about the development of vision in wild birds. It is unknown, for example,
whether the ability to see can be predicted by the level of prenatal growth or whether the …

Retinal ganglion cell (RGC) isodensity maps indicate important regions in an animal's visual
field. These maps can also be combined with measures of focal length to estimate the …

Hummingbirds are a group of small, highly specialized birds that display a range of
adaptations to their nectarivorous lifestyle. Vision plays a key role in hummingbird feeding …

Abstract The diurnal Dipsadidae snakes Philodryas olfersii and P. patagoniensis are closely
related in their phylogeny but inhabit different ecological niches. P. olfersii is arboreal …

Simple Summary The eye in birds has evolved through time to facilitate foraging and detect
potential threats, such as predators. The size of the eye affects how much light is captured …