| Spectacled cormorant | |
|---|---|
 | |
| Illustration byJoseph Wolf | |
Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Suliformes |
| Family: | Phalacrocoracidae |
| Genus: | Urile |
| Species: | †U. perspicillatus |
| Binomial name | |
| †Urile perspicillatus (Pallas, 1811) | |
| Synonyms | |
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Thespectacled cormorant orPallas's cormorant (Urile perspicillatus)[2] is anextinct marinebird of thecormorant family ofseabirds that inhabitedBering Island and possibly other places in theCommander Islands and the nearby coast ofKamchatka in the far northeast ofRussia.[1] The modern distribution was shown to be a relict of a wider prehistoric distribution in 2018 when fossils of the species from 120,000 years ago were found inJapan. It is the largest species ofcormorant known to have existed.[3]
It was formerly classified in the genusPhalacrocorax, but in 2021, theIOC reclassified it and several other Pacific cormorant species into the genusUrile, based on a 2014 study that supported reclassifying theBrandt's,red-faced, andpelagic cormorants into that genus. Although the spectacled cormorant was not mentioned in the 2014 study and its current taxonomic position is unresolvable by the current phylogenies, it was also reclassified intoUrile based on its perceived relatedness to those species.[4][5]
The species was first identified byGeorg Wilhelm Steller in 1741 onVitus Bering's disastrous secondKamchatka expedition. He described the bird as large, clumsy and almost flightless – though it was probably reluctant to fly rather than physically unable – and wrote "they weighed 12–14 pounds, so that one single bird was sufficient for three starving men." Though cormorants are normally notoriously bad-tasting, Steller says that this bird tasted delicious, particularly when it was cooked in the way of the nativeKamchadals, who encased the whole bird in clay, buried it, and baked it in a heated pit.[6]
With a body mass estimated to be from 3.5 to 6.8 kg (7.7 to 15.0 lb) and a length up to around 100 cm (39 in), the spectacled cormorant was rather larger than all other known cormorants.[7][8] In a similar fashion to the extantflightless cormorant, which may have rivaled it in length but not weight, the spectacled cormorant is thought to have at least largely lost the power of flight which is borne out by the reduced sternum and wing chord of museum specimens.[9][10] This species was largely glossy black in color with a reported greenish gloss that may have been fairly vivid in bright light.
A contrasting large white patch could be seen on its lower flanks just above the legs. Like other cormorants, they had small patches of bare skin about the face including a small gular patch and a small amount of bare skin around the eyes; these areas usually appeared to have been dull-yellow or grayish in hue, but during breeding stages, they may have changed to a bright orangey-reddish hue.[10] During breeding stages, they also had a prominent crest on their head. The bare skin around the eyes, as well as the crest, were not present in females.[11]
Apart from the fact that it fed onfish, almost nothing else is known about the life history of this bird. The population declined quickly after further visitors to the area started collecting the birds for food andfeathers. Their reports of profitablewhaling grounds and large populations ofArctic foxes and other animals with valuable pelts led to a massive influx of whalers and fur traders into the region; the last birds were reported to have lived around 1850 onKamen Ariy (Russian:Камень Арий[12])islet, off the northwestern tip ofBering Island.
Only seven known specimens are currently preserved in public collections, with all specimens collected and given away by the same individual.[11] None of these specimens are available on public display.
A presumed prehistoric record fromAmchitka Island,Alaska,[13] is based on misidentification ofdouble-crested cormorant remains.[14]
