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The origin and evolution of birds
Ornithologist and evolutionary biologist Alan Feduccia, author of "Age of Birds," here draws on fossil evidence and studies of the structure and biochemistry of living birds to present knowledge and data on avian evolution and propose a model of this evolutionary process.
Explosive Evolution in Tertiary Birds and Mammals
The traditional view of avian evolution over the past century is that of sluggish gradualism, in which many living orders of birds are thought to have originated from the mid-Cretaceous or so (1),
Evidence from Claw Geometry Indicating Arboreal Habits of Archaeopteryx
  • A. Feduccia
  • Biology, Environmental Science
  • 5 February 1993
Examination of claw geometry shows that modern ground- and tree-dwelling birds can be distinguished on the basis of claw curvature, and that Archaeopteryx appears to have been a perching bird, not a cursorial predator.
Developmental Patterns and the Identification of Homologies in the Avian Hand
Comparison to serially homologous elements of the hindlimb indicates that the retained digits of the avian hand are II-III-IV, similar to theropod hands.
Presbyornis and the origin of the Anseriformes (Aves, Charadriomorphae)
The abundant Eocene fossil Presbyornis combines the body of a shorebird with a duck-like head and shows the Anseriformes to have evolved from the Charadriiformes, indicating a probable mid-Tertiary date for the major radiation of Anatidae.
The hand of birds revealed by early ostrich embryos
Analysis of digit anlagen in the avian hand has revealed those for digits/metacarpals I and V, thus confirming previous embryological studies that indirectly suggested that theAvian hand comprises digits II, III, IV, and was primitively pentadactyl.
Confuciusornis sanctus Compared to Archaeopteryx lithographica
This poster presents a probabilistic reconstruction of the distribution and distribution of Carboniferous strata of the Tournaisian to Westphalian age, using a model derived from X-ray diffraction analysis of 120-million-year-old remains found in Argentina.