Why do bald eagles show a white head only as adults?
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検索に打ち込む長い質問：この種は何か、点数は公式か、次に何を見るか。
ファミリーで絞るかキーワードを入力。各回答は種ハブへ戻ります。
該当する動物がありません。
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Are “eagle” species one lineage?
No. “Eagle” is a grade inside Accipitridae. Sea eagles (Haliaeetus) and booted eagles (Aquila) split tens of millions of years ago.
Why is the Philippine eagle a different conservation story?
Pithecophaga jefferyi is a forest-interior endemic with perhaps a few hundred adults. Logging and shooting, not eggshell thinning, dominate the threat list.
What do white-tailed eagles eat in the UK reintroduction?
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Is the bald eagle only a US bird?
Breeding spans Alaska to northern Mexico and both coasts of Canada. The US recovery is the famous chapter, not the whole range.
Why can some owls hunt in total darkness?
Barn owls can strike by hearing alone. Asymmetric ear openings give elevation; the facial disc gives azimuth. Vision still matters in starlight.
Are owls wise in the biological sense?
Corvids and parrots outscore owls on many lab tasks. The “wise owl” is Athena’s bird, not a working-memory ranking.
Why did Harry Potter use a snowy owl?
Hedwig is Bubo scandiacus, an Arctic lemming specialist. The films made a tundra bird the global pet-owl image — and briefly spiked illegal trade.
How variable are barn-owl clutches?
Tyto alba can lay 2–12 eggs when vole cycles peak. Nest-box programmes in UK barns track that boom-bust directly.
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Are penguins only Antarctic?
No. Galápagos penguins breed on the equator. African penguins nest on Namibian and South African islands. Antarctica holds the emperors and Adélies, not the whole family.
How deep do emperor penguins dive?
Tagged emperors have exceeded 500 m and stayed down more than 20 minutes. That is a seal-like performance on a bird lung.
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Do hummingbirds live on sugar water alone?
No. Nectar is fuel. Arthropods supply protein, especially for chicks. Feeders that omit insects do not replace a territory.
How does a 3-gram bird cross the Gulf of Mexico?
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Are hummingbirds only tropical?
Diversity peaks in the Andes. Anna’s hummingbirds now winter in Vancouver gardens; ruby-throated breed to southern Canada.
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Sword-billed hummingbirds match 10–14 cm bills to Datura and Passiflora corollas — a coevolution exhibit, not an ornament.
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Do American flamingos still belong in Florida?
A breeding population has returned to Florida Bay after a long absence. Some birds are escapees; others are wild Caribbean wanderers — the mix is a current field argument.
Is the plastic lawn flamingo part of the biology story?
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Irene Pepperberg’s papers treated English tokens as categories, not circus tricks. Alex (1976–2007) identified colours, shapes and same/different above chance. The debate is about the ceiling, not whether the tasks happened.
Why did African greys move to CITES Appendix I in 2017?
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Are London’s ring-necked parakeets a conservation win?
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How does dynamic soaring let an albatross fly cheaply?
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Do mice really eat albatross chicks?
On Gough and some other islands, introduced house mice attack chicks of albatrosses and petrels. Eradication attempts are now as central as hook rules.
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BirdLife assessments have long placed a majority of Diomedeidae in threatened categories — an unusual concentration for a small family.
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The taxonomy hero is Grus japonensis -- Kushiro, the Korean DMZ and Izumi. Other Grus species appear as comparison, not as the page type.
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The Aransas-Wood Buffalo flock was about 21 birds in 1941. That nadir still defines US recovery graphs.
What did George Archibald do at ICF?
He courtship-danced with a human-imprinted whooping crane named Tex so she would ovulate -- a 1980s method story, not a field census.
Why is Izumi a single-point risk?
A large share of the migratory island population winters on one Kyushu floodplain. Influenza years there are species-level events.
Do cranes mate with a lifelong dance?
Pairs are typically socially monogamous. The dance is pair-bond and territorial display, not a fairy-tale wedding.
Why costume-rear whooping cranes?
Chicks imprint on humans and then fail to migrate or pair. Operation Migration ultralights (2001-2015) tried to teach a new flyway.
Did Jaws change great-white numbers or only stories?
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What is the White Shark Cafe?
A mid-Pacific patch where California-tagged whites linger. Foraging on midwater squid and fish is the working hypothesis, not a seal colony.
Who is Deep Blue?
A very large female photographed at Guadalupe and later Hawaii -- a media name, not a stock assessment.
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Do whites migrate like tuna?
Many coastal adults make basin-scale loops (California-Cafe-Hawaii). Site fidelity to seal colonies is seasonal.
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Cape Cod and parts of California show more sightings as grey seals rebounded. Sightings are not a global Vulnerable reversal.
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Are hatcheries a solution or a delay?
They keep harvest numbers up and can dilute wild fitness. The argument is now about proportions, not existence.
Why are Atlantic salmon a different politics?
Wild S. salar collapsed in much of Europe and New England. Farmed Atlantic salmon in net pens are a separate industry with sea-louse and escape files.
Did Boldt (1974) change more than courtrooms?
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Is the January auction price a stock assessment?
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Is Pacific bluefin the same fight?
Thunnus orientalis is a different species under WCPFC/IATTC math. The sushi case looks identical; the commissions do not.
Are there spawning grounds still in the Gulf of Mexico?
Western stock spawning in the Gulf remains a closed-area and oil-spill argument after 2010 Deepwater Horizon papers.
How does sex change work?
A group is a female, a breeding male and non-breeders. If the female dies, the male changes sex. The film missing-mother plot skipped that rule.
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Several trade analyses reported a demand spike after 2003. Captive-bred ocellaris later absorbed much of the legal market in the US and EU.
Are clownfish good parents in the film sense?
Males tend the nest of demersal eggs. The biology is paternal care, not a transoceanic search.
Why CITES Appendix II in 2002?
Documented international trade in dried and live animals met a genus that is sparse, site-faithful and easy to over-collect.
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Are all seahorses monogamous?
Many pair; some do not. Daily greeting dances are real in several species and over-generalised in documentaries.
Are koi just goldfish?
No. Goldfish descend from Prussian carp (Carassius). Koi are ornamental common carp (Cyprinus carpio) fixed in Niigata. The atlas seeAlso cannot point at goldfish because that id is not in the taxonomy.
Why do Israeli and US farms matter?
After the 1960s export boom, Israeli and US growers scaled food-and-ornamental carp. Butterfly fins are largely a non-Niigata aesthetic.
Are escaped koi a conservation problem?
Common carp are invasive in many rivers and lakes. A show pond is secure; a flood overflow is not a garden anymore.
Did Monet paint koi?
Giverny water lilies host carp in the public mind. The nishikigoi fancy is Japanese; the Impressionist pond is a later cross-reading.
Why was Takifugu rubripes sequenced so early?
A compact genome (about 400 Mb) made it a 2002 model in Nature -- a puffer as a human-genome shortcut, not a menu story.
How does inflation work?
The fish gulps water into a specialised stomach diverticulum. Spines (in some species) erect. It is a mechanical jam, not a bluff only.
Do puffers make their own TTX?
Much evidence points to bacterial and food-chain accumulation. Captive-raised puffers can be far less toxic -- a husbandry fact that complicates folklore.
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How strong is the shock?
E. voltai has been measured near 860 V. That is a prey-stun and defence pulse, not a household-current analogy that holds in every tank.
What did Humboldt actually do in 1800?
His account of horses herded into a pool of eels became a European science anecdote. Later readers treated it as a method; it was also travel theatre.
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No. LC reflects a wide Amazon-Orinoco footprint. Dams, drought and capture are local, not a comic-book immunity.
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Captive voltage and diet differ. Field E. voltai numbers should not be read off a pet-shop tube.
野生のトラは何頭残っているか
2020年代の世界推定は年と方法により約4,000–5,500頭です。過半数はインドにあります。この数字はカメラトラップの産物であり、ヴィクトリア朝の狩猟談ではありません。
プロジェクト・タイガーは効いたか
インドの野生個体数は1970年代の危機から、国別では最大の個体群まで増えました。方法が足跡からカメラへ変わり、グラフは一つの計器ではありません。東南アジアはその回復を写しませんでした。
トラとライオンを同じ点数にしない理由は
ライオンは危急で、アフリカの分布は広く、ギルの残存はごく小さい。トラは絶滅危惧で、より森林に縛られ、南・東アジアの文化的比重が大きい。点数は24種のあいだの相対値です。
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Lions structure some savanna systems; elephants and wolves outrank both as engineers or keystones in this atlas. Culture is flags, churches and film -- lions win that axis. Scores stay relative across 24 types.
What is different about Gir lions?
Asiatic lions are a single-forest population with a distinctive belly fold and a thinner mane. A disease or fire there is a subspecies event.
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No. Most African populations are still in long decline outside a few well-funded parks. VU is not a rebound band.
What did Born Free fix in the public mind?
Elsa the lioness (1960 book, 1966 film) made rehabilitation a children story. Field lion work is pride demography and conflict, not a single tame cat.
Were the Tsavo man-eaters typical?
1898 bridge-camp killings were a specific railway-and-drought story. They are a genre, not a base rate.
Why bush elephant, not African elephant in general?
The taxonomy wiki is African bush elephant. Forest elephants (L. cyclotis) were widely recognised as a separate EN/CR story in the 2021 IUCN assessments.
What did the 1989 ivory ban do?
It collapsed legal international commercial trade. Domestic markets, stockpiles and later one-off sales (2008) kept the argument alive. Poaching did not end in 1989.
Who is Cynthia Moss in this file?
Amboseli Elephant Research Project since 1972 -- matrilines with names and decades of calves, the opposite of an anonymous ivory graph.
Are elephants the highest ecological-role score for a reason?
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Why is resilience low if some parks are full?
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What is Isle Royale?
A closed wolf-moose system studied since 1958. Inbreeding and later genetic rescue (2018-) made it a lab of isolation.
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Folklore is a cultural-impact input. It is not a diet study.
Why is ecological role scored low?
Pandas are bamboo specialists in a small mountain belt. They do not engineer continents like elephants or move ocean nutrients like whales. The score is relative, not an insult.
Is captive breeding the wild recovery?
Captive numbers rose. Wild recovery needs corridors (the national park idea) more than more cubs on camera.
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No. Ailurus is a different family. This atlas type is the giant panda only.
Why is resilience low if some subpopulations look stable?
IUCN VU and the 2008 ESA listing rest on ice-season length. A few stable stocks do not cancel a circumpolar ice forecast. High resilience in this atlas means secure (koi, many owls), not famous.
Is Churchill typical?
Western Hudson Bay is an early-ice-loss stock and a tourist town. It is a visible subpopulation, not the whole Arctic.
What is Nanook of the North to this file?
The 1922 film staged Inuit life for a southern camera. It is a portrayal, not an ethnography of nanuq knowledge.
Why the lowest resilience in the 24?
CR western gorillas plus Ebola, logging and hunt. Mountain gorilla rebound is real and is a different species card.
Who was Digit?
A mountain gorilla poached in 1977. Fossey used the death to fund anti-poaching -- a mountain, not western, story that still titles books.
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Did Roger Payne study blues?
Payne whale-song fame is mostly humpback. Blue-whale acoustics (low-frequency pulses) are a later Navy-and-NOAA file.
What is a pygmy blue whale?
A southern subspecies/form -- smaller, still EN, often confused in catch histories.
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In some coastal stocks (Sri Lanka, California) yes -- a recovery problem that 1966 did not imagine.
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