Mar 18, 2025 · National Center for Biotechnology Information - PubMed Central - Avian Physiology: Are Birds Simply Feathered Mammals?

Britannica Dictionary definition of AVIAN. technical: of or relating to birds. avian species. avian behavior [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. ASK …

5 days ago · Passeriform, any member of the largest order of birds and the dominant avian group on Earth today. Passeriforms (or passerines) are true perching birds, with four toes, three …

Mar 17, 2025 · Biodiversity, the variety of life found in a place on Earth or, often, the total variety of life on Earth. A common measure of this variety, called species richness, is the count of …

Apr 3, 2025 · Most bees are polylectic, meaning that they gather pollen from a wide variety of flowers. However, some bees collect pollen only from flowers of certain families, others from …

Mar 18, 2025 · Bird - Feather Evolution, Flight, Adaptation: Feathers are complex and novel evolutionary structures that evolved before birds and avian flight. The evolution of avian flight …

avian malaria, infectious disease of birds that is known particularly for its devastation of native bird populations on the Hawaiian Islands. It is similar to human malaria in that it is caused by single …

Mar 27, 2025 · coronavirus, any virus belonging to the family Coronaviridae. Coronaviruses have enveloped virions (virus particles) that measure approximately 120 nm (1 nm = 10 −9 metre) in …

Mar 18, 2025 · Avian striated muscles contain a respiratory pigment, myoglobin. There are relatively few myoglobin-containing cells in “white meat,” whereas “dark meat” derives its …

Mar 13, 2025 · macaw, common name of about 18 species of large colourful parrots native to tropical North and South America. These brightly coloured long-tailed birds are some of the …