Hummingbird in 1920s: Crawford Greenewalt prep — Section 962: Crawford Greenewalt prep
Record 962 on Hummingbird explains what the threshold 1960 means in practice under “Crawford Greenewalt prep”. hummingbird · beat 3 · Ruby-throated cross water; Andean species track blooming upslope. 1920s: log Hummingbird under “Crawford Greenewalt prep” with 1960. Do not rank the species. Lichen-and-silk cups hold two pea-sized eggs.
New World nectar specialists that hover on figure-eight wings and migrate on a few grams of fat. How can a hummingbird hover when other birds cannot? The shoulder allows a nearly horizontal figure-eight. Lift on the upstroke as well as the downstroke pays the hover bill that a typical avian stroke cannot.
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? Ruby-throated hummingbirds fatten, then fly 800+ km nonstop. Tailwinds and a high mass-specific power output make the crossing possible, not a rest on ships.
A controlled drop in body temperature and metabolic rate overnight. Without it, many species would exhaust nectar stores before sunrise. Diversity peaks in the Andes. Anna’s hummingbirds now winter in Vancouver gardens; ruby-throated breed to southern Canada. Who first illustrated hummingbirds for Europe?
Keep 1920s, “Crawford Greenewalt prep,” and 1960 together or the note on Hummingbird stops being that year’s record. 1920s: log Hummingbird under “Crawford Greenewalt prep” with 1960. Do not rank the species. 19601920s
Figures to keep
- Reference
- 1920s
- Key figure
- 1960
- Topic
- Hummingbird
- Focus
- Crawford Greenewalt prep
Interactive Scenario & Decision Matrix
Select your current objective to inspect the recommended benchmark, threshold, and verification path.
The resilience mark to keep is {res}.
Briefing 11 for African bush elephant aligns condition “Amboseli project starts” with reference value 2021 on the ground.
African bush elephant: 2021 (1972)The ecological-role mark to keep is {eco}.
Reading 12 of African bush elephant uses “Douglas-Hamilton continent count” and figure 2021 as a checkable baseline.
African bush elephant: 2021 (1979)Write {res} and {eco}. Neither mark makes {name} the winner.
Atlas note 13 on African bush elephant defines the operating range of 2021 when “CITES ivory ban” applies.
African bush elephant: 2021 (1989)Reading 4 of African bush elephant uses “Kruger culling pause” and figure 2021 as a checkable baseline.
Dossier 14 for African bush elephant links case “Kruger culling pause” directly to metric 2021 (1995).
African bush elephant: 2021 (1995)United States (US) Institutional & Field Benchmark
US- Primary reference framework
- Browse birds, fish, and wildlife with conservation context — not a pocket field key.
- Verification standard
- Season lens: migration and breeding calendars shift by hemisphere — open a species, then check local phenology before planning trips.
- Metric & unit convention
- African bush elephant · 2021 (1972)
Species pages synthesize ecology, culture, and conservation for browsing — scores are editorial lenses, not IUCN ranks.
Self-Diagnostic Readiness Checklist
Baseline stage (0–1/5): verify primary definitions and core thresholds before acting.
5-Step Execution & Verification Playbook
- Pin one anatomy system — Start with {anat0} already in the anatomy chapter.
- Pin one behaviour principle — Pair it with {beh0} from how-it-works — a reading aid, not a winner board.
- Read conservation as literacy — Resilience and any IUCN label on file are published notes, not a live red-list API.
- Scores are not a species ranking — The six hub marks compare types in this atlas; they do not crown a best species.
- African bush elephant (5) — Atlas note 45 on African bush elephant defines the operating range of 2021 when “Amboseli project starts” applies.
Myth vs. Evidence Fact-Check
How do I read tiger anatomy against behaviour on this page?
Pin one anatomy system already listed, for example Support and integument (striped ambush body and a neck-or-throat killing bite) or Feeding apparatus (sit-and-ambush on chital, sambar, wild pig), against one how-it-works principle such as Energy in, work out or Information before motion. The pair is a reading aid, not a winner board.
Does this atlas rank tigers against lions or other species?
No. Scores are relative editorial marks across 24 types: speed 69, intelligence 76, range 37, resilience 14, cultural impact 94, ecological role 82. They are not a best-species ranking and not a live race.
Is the resilience number a live IUCN feed?
No. Resilience 14/100 is an on-file teaching band: Endangered, with India counts up after Project Tiger (1973) and Tx2 pledges (2010), while Southeast Asian and South China lineages did not share that graph. There is no live Red List poll on this page.
Why pin night vision with the striped coat?
The anatomy chapter says night vision and hearing work in closed forest, and stripes break outline more than they advertise. The matching behaviour principle is Information before motion. Pinning those two together teaches the ambush already on file; it is not a new field measurement.
Domain Jargon & Terminology Decoder
- 1
- Name the question (ID, trip, report, compare) before opening sections.
- 2
- Cross-read anatomy with culture and market.
- 3
- Verify protected status on primary sources.
- 4
- Do not treat meters as absolute rankings.
- African bush elephant (One-off ivory sales)
- Analysis 65 for African bush elephant anchors “One-off ivory sales” to indicator 2021 so readers can verify the scale.
- African bush elephant (Tanzania)
- Record 66 on African bush elephant explains what the threshold 2021 means in practice under “Tanzania”.
Risk & Failure-Mode Early Warning Radar
- This is not a field identification key and not veterinary advice. Protected-status claims need local law checks.
- Section 72 on African bush elephant pairs “Douglas-Hamilton continent count” with benchmark figure 2021 (1979) for a grounded decision.
- Analysis 73 for African bush elephant anchors “CITES ivory ban” to indicator 2021 so readers can verify the scale.
- Record 74 on African bush elephant explains what the threshold 2021 means in practice under “Kruger culling pause”.
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