Proavis
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Proavis is a hypothetical extinct species or hypothetical extinct taxon. The term was coined in the early 20th century in an attempt to support and explain the hypothetical evolutionary steps and anat
Hypothetical restoration of "one of the Pro-Aves", as shown at the British Museum by William Plane Pycraft in 1906 (here extracted from Pycraft 1910 book A History of Birds).
Illustration of "a running Pro-Avis" as envisioned by Franz Nopcsa in 1907 after having seen the Pycraft restoration "One of the Pro-Aves".
A hypothetical "Tetrapteryx", as imagined by William Beebe (1915).
Gerhard Heilmann's arboreal vision of Proavis (1916).
Hypothetical species
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Several species have been assumed to exist, but due to a lack of physical evidence they can only be regarded as hypothetical or potential species. Hypothetical species are usually believed to be extin
Proavis
…Proavis is a hypothetical extinct species or hypothetical extinct taxon. The term was coined in the early 20th century in an attempt to support and explain the hypothetical evolutionary steps…
A 1722 illustration by Jean-Baptiste Labat of three parrots on Guadeloupe. There are no remains of these species, so accurate taxonomic classification is impossible.
Illustration of "Leguat's giant", a bird from Mauritius now believed by some researchers to be based on sightings of the greater flamingo