Different kinds of molecular changes at one genetic locus control different feather pigmentation patterns, and the darkest patterns resulted from hybridization with another species.

Feathered feet of pigeons and chickens result from a partial molecular and morphological transformation of legs to a wing-like identity.

Cuticulosomes are organelles found in the hair cells of birds that are composed of ferritin nanoparticles, form rapidly after hatching by the fusion of vesicular structures, and may play an indirect role in magnetic sensation.

Carotenoids are not just required as core components for plastid biogenesis, they can be cleaved into an apocarotenoid signal that regulates etioplast and chloroplast development during extended periods of darkness.

The readiness potential—a long-established neural precursor of voluntary action claimed to precede the onset of the conscious decision to move—is absent, or at least significantly reduced, for deliberate decisions.

The experience-dependent representation of time interval in the seconds-to-minutes range occurs as early as at the thalamic level in the brain.

Newly discovered viruses in dead and dying farmed Chinook salmon are widely distributed in threatened wild Chinook and sockeye salmon populations.

The dynamics of Sirtuin 6 binding to the nucleosome shed light on how it is able to deacetylate histone H3 lysines close to the core, including K27.

Simultaneous stimulation and recording in awake-behaving pigeons showed that mid-infrared stimulation, as a promising neuromodulation approach, could facilitate or suppress neuronal firing activity depending on its ongoing sensory responsiveness levels, and cause reversible and gain modulation on sensorimotor behavior.

Ephemeral leadership between differently experienced birds regulates the balance between exploration and exploitation over successive homing flights in a manner that facilitates the accumulation of route innovations.