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Studying the development of the medial amygdala in the mouse reveals how the brain may potentially process sex differences in innate behaviors such as mating.

The eggshells of palaeognath birds (e.g. ostrich, moa, kiwi, emu) have diverse homology and convergent features, and are useful modern analogues for the evolution of non-avian dinosaur eggshells.

Multiple levels of gene regulation in the TGFβ signaling pathway mediate the expression of Mmp13, establish species-specific domains of bone resorption, and likely generate evolutionary variation in jaw length.

BMP-dependent retinoic acid signaling is responsible for the separation of central from peripheral lineages during neural development.

During the evolution of amniotes, the transformation of branchial arches coincided with the drastic remodeling of the ancestral extrinsic cardiac arteries, giving rise to novel ventricular coronary arteries that are unique to amniotes.

Transfection of quail primordial germ cells considerably expands the possibilities of genome modifications in birds, elevating the quail to the rank of genetic laboratory animal models of reference.

Molecular analyses reveal the neuroendocrine control of seasonal life-history transitions in birds.