Field Determination · Panel of Thirty-Six
Two photographs · one individual · IMG 4623 & 4624

The Bird in Question

A backlit silhouette under the eaves, resolved by a jury of A.I. observers.
36Observers
18for Starling
3 / 3Providers agree
9Species named
0Failed
PLATE I·II

The Specimen

Photographed from directly below at the corner of a soffit, against a bright overcast sky. The backlighting flattens the bird to a near-silhouette — the single fact that sent three A.I. providers down different paths. Turn on the field marks to see what the plumage hides.

View: Hover / tap a marker
Bird at the soffit corner, photograph one
Plate I — IMG 4623SOFFIT CORNER · BILL-FULL
Bird at the soffit corner, photograph two
Plate II — IMG 4624MOMENTS LATER · LEANING OUT
§ 01

The Determination

Five field marks converge on European Starling — and, decisively, rule out the swallows and raptors that the silhouette invites. Below, the case as the panel built it.

i.

Stocky, big-headed, short-tailed build

A compact triangular body with a large head and a stub of a tail — the starling gestalt. Swallows are sleek with long wings and a forked or notched tail; the proportions here are wrong for them.

ii.

A spiky bill-full of insects

In both frames the bird holds a dark, bristling clump of invertebrate prey — leatherjackets and the like — carried crosswise. This is an adult provisioning nestlings, and it rules out seed-eaters (House Finch) and single-prey carriers.

iii.

Emerging from a soffit cavity

The bird is wedged where the dark fascia meets the pale soffit — a crevice/cavity, not a mud cup or gourd. European Starlings are the archetypal building-soffit cavity nester; swallows build open mud nests instead.

iv.

Green sheen on the crown

Even against harsh backlight, a faint iridescent gloss reads on the head — the oil-on-water sheen of starling plumage, absent in sparrows, finches, and swallows.

v.

Size against the siding

The body runs slightly longer than one exposed lap-siding board (~15–20 cm) — larger than a House Sparrow, far smaller than any hawk. Starling-sized, and provisioning young in late July fits the breeding calendar.

Panel confidence
Moderate–High

Caveat of the field: these are backlit photos shot straight up into the sky. No panel — human or machine — should call this a certainty. The weight of evidence, and the agreement of every provider on one name, is what makes Starling the answer of record.

§ 02

Charge to the Observers

Twelve agents were dispatched to each of three providers. The Claude cohort inspected the pixels directly; the Codex and Grok cohorts each ran their provider's own vision model through its CLI, relayed faithfully and unedited. The exact wording each cohort received:

Claude12 · direct vision
Each agent opened both photographs with its own eyes and reasoned to a species.
You are an expert field ornithologist performing a careful blind identification. Open BOTH image files and visually inspect them. They show the SAME individual bird photographed moments apart, viewed from directly below against a bright overcast sky at the corner of a building's eave/soffit. The bird is partly backlit.

Work the evidence before committing:
• SIZE: compare the body length to the width of one horizontal lap-siding board.
• Silhouette, head and bill shape, tail shape, posture.
• Whether it is holding anything in its bill.
• Habitat/behavior and what it implies about nesting.
Then commit to your single best species. Do not stop at family level unless truly impossible.
Cohort verdict: split — Swallow 5 / Starling 4
Codex12 · codex exec
A Claude relay ran the Codex CLI on both images and reported its verdict verbatim.
$ codex exec -i IMG_4623 -i IMG_4624 \
  "Identify the bird in these two photos of
   the SAME individual bird. It may be a small,
   backlit bird perched at a building eave or
   soffit, possibly holding food in its bill.
   Weigh its size against the siding boards.
   Give the single most likely species as a
   common name, then one sentence of reasoning."
Cohort verdict: unanimous — Starling 12 / 12
Grok12 · grok -p
A Claude relay ran the Grok CLI on both images (isolated sockets) and reported verbatim.
$ grok -p "Examine the two image files
   IMG_4623 and IMG_4624. They show the SAME
   individual bird in two photos, viewed from
   directly below at a building eave against a
   bright sky. Weigh its size against the siding
   boards. Identify the bird species: reply with
   the single most likely common name, then one
   sentence of reasoning."
Cohort verdict: scattered — 7 species, no majority

All three cohorts returned through the same JSON schema — { species_common, species_scientific, confidence, reasoning, raw_answer } — so 36 free-form judgments could be tallied as one ballot.

§ 03

The Ballot

Thirty-six independent judgments, nine species named. European Starling is both the plurality and the only name that appears in all three providers' returns.

Starling (verdict) Other songbird Raptor (silhouette error)
§ 04

The Field Reports

Every observer's return, with its verdict, its confidence, and its token cost. Click any card to read the full reasoning and the raw answer it filed.

Filter: Sorted by cohort · then confidence
§ 05

The Ledger

What the determination cost, in tokens. The 36 sub-agents run on Claude; the Codex and Grok cohorts additionally spend their providers' own vision-model tokens, billed separately by OpenAI and xAI. Figures for this session are captured before this very page was written.

On the accounting: "Total processed" sums fresh input, cache writes, cache reads, and output. Cache reads are re-supplied context billed at a fraction of fresh input, so the processed figure runs well above what a single pass would cost. "Output" is the tokens each model actually generated — the truest measure of thinking done. CLI figures are each provider's own self-reported usage.

§ 06

Why the Observers Disagreed

A single photograph did the damage. Shot straight up into a bright sky, the bird reads as a dark shape with a hooked lean — and a hooked shape at the eaves whispers raptor. That is exactly the trap two of Grok's twelve observers fell into, naming a Cooper's Hawk and a Sharp-shinned Hawk; a third reached for an American Kestrel. The silhouette, not the bird, was talking.

Codex was the disciplined witness: all twelve returns said European Starling, and their reasoning kept landing on the same three anchors — cavity at the soffit, bill-full of insects, stocky short-tailed build. Unanimity on a hard, backlit subject is the strongest signal the panel produced.

Claude's cohort was the most cautious, and split its vote: five agents read the aerial-insectivore posture and beak-full as a Barn Swallow bringing food to an eave nest; four held out for Starling on the cavity and the crown-gloss. Careful, but over-weighting behavior over structure.

Grok was the widest scatter — American Robin, House Finch, House Sparrow, three different raptors, and only two votes for Starling. High variance, low agreement: a cohort that, on this subject, you would want to see corroborated.

The lesson of the ballot is not that one model "won." It is that consensus across providers — the one name, Starling, that Claude, Codex, and Grok all independently reached — outperforms any single confident voice. Thirty-six eyes, three of them fooled by a shadow, still converge on the bird.