The training images include bird and non-bird regions, and we prepared a class of bird and seven background classes.
In its early years, you would typically wait an hour or more for a table on dim sum Sunday mornings, and in the evenings, the vast hall would be subdivided for wedding banquets and business dinners that featured the best class of bird's nest soup and such oddities as Dragon and Phoenix platters that occasionally included real snake.
There are 2 classes of bird color vision that differ primarily in their sensitivity to violet and UV light.
The three Delichon species are members of the swallow family of birds, and are classed as members of the Hirundininae subfamily which comprises all swallows and martins except the very distinctive river martins.
The Ptyonoprogne species are members of the swallow family of birds, and are classed as members of the Hirundininae subfamily, which comprises all swallows and martins except the very distinctive river martins.
The Phedina species are members of the swallow family of birds, and are classed as members of the Hirundininae subfamily, which comprises all swallows and martins except the very distinctive river martins.
An obstinately real creature like the ostrich becomes, in her great poem of 1941, "He 'Digesteth Harde Yron' " (she lifted the title from John Lyly's sixteenth-century romance "Euphues"), the "one remaining rebel" of the otherwise extinct class of flightless birds — moas, aepyornises — only by being "magnificently speedy".
These submissions represented 136 species from all classes of vertebrates (birds 78%, reptiles 11%, mammals 10%. amphibians 2%, fish <1%).
Among them: Why did a large class of now-extinct birds called Enantiornithines (which were superficially similar to modern birds) die out?
Nowhere, perhaps, was the extinction more striking than in New Zealand, where an entire class of large flightless birds called moas, 11 species and an estimated 160,000 individuals in all, once lived.
