Domain: Humanities and Social Sciences — Geography
Target concept: Tropical Rainforest Fauna: Amazon Macaw (vibrant plumage) vs. Congo Parrot (grey plumage)

Video generation prompt: First, a brightly colored Amazon parrot is presented, followed by a Congo parrot. The two birds are displayed in sequence, highlighting their size and feather coloration as key characteristics.

Evaluation guide:
(i) Target concept: Visual discrimination of two ecologically and taxonomically distinct parrot species via diagnostic plumage traits and relative size, presented sequentially to enable direct comparative observation.
Minimum mechanism: The video must preserve species-identifying chromatic and morphological features under consistent viewing conditions, enabling reliable categorical distinction without textual labels or external annotation.
(ii)Storyline: [Frame 0–t1] Static or gently animated Amazon Macaw occupies full frame: all key color zones (red head, blue rump, yellow wing patch) fully visible and non-occluded; [Transition] Clean temporal separation (no overlap, no morph); [Frame t2–t3] Congo Parrot enters identical frame: ash-grey body with pale scalloped feather edging and a solid red tail fully visible, clearly smaller in overall body size than the Amazon Macaw shown just before it; [Constraint] Fixed viewpoint, consistent lighting, no camera motion, no background change; [Visibility] Both birds fully in frame, front-facing or slightly angled (≤30°), no obstructions, all diagnostic plumage regions unoccluded and lit to reveal true color.

Manual:
Experimental Procedure
1. Display a single Amazon Macaw in clear frontal view, motionless or gently perched, for duration sufficient to observe full plumage.
2. Transition cleanly to display a single Congo Parrot in identical frontal view, motionless or gently perched.
Observation of Experimental Phenomena
- First bird shows vibrant, multi-color plumage (red head, blue rump/tail, yellow shoulder, white face ring) and a large body size (~85 cm).
- Second bird shows an overall ash-grey body with pale scalloped feather edging and a solid crimson-red tail, and a visibly smaller body size (~33 cm) than the first bird.
- Plumage colors and the size difference are visually distinct and unambiguous.
Summary of Experimental Principles
- Amazon Macaw (Ara macao) is native to the Amazon Basin and exhibits vividly multicolored red/blue/yellow plumage that stands out against the green forest canopy.
- Congo Parrot (Congo African Grey Parrot, Psittacus erithacus) is native to the rainforests of Central Africa and exhibits an ash-grey body with a diagnostic solid red tail; at roughly 33 cm in length it is markedly smaller than the Amazon Macaw's roughly 85 cm length.

Prompt Grounding rubric:
level_1: No parrot appears anywhere in the video, or only one bird appears with no way to tell from its position or traits whether it represents the Amazon Macaw or the Congo Parrot, or both birds are shown at the same time rather than one after another.
level_2: At least one clearly bird-shaped animal appears, but neither bird shown matches the look of a large, vividly multicolored red/blue/yellow Amazon Macaw or a smaller, ash-grey-bodied Congo Parrot with a red tail; or the Congo Parrot appears before the Amazon Macaw instead of after it.
level_3: Two distinct parrots appear in strict order (first a large, vividly multicolored Amazon Macaw, then a smaller, ash-grey-bodied Congo Parrot with a red tail), each shown one at a time, never side by side, and each identifiable from its plumage pattern alone; exactly two birds appear in total.
level_4: All level-3 conditions are met, and in addition: both birds are shown from the same fixed camera framing with no repositioning, re-zooming, or angle change between the two shots; each bird stays fully within frame for the entire duration of its own shot; nothing (cage bars, a hand, text) covers or distorts either bird's diagnostic plumage.
level_5: All level-4 conditions are met, and in addition: the cut from the Amazon Macaw shot to the Congo Parrot shot is clean, with no overlap, cross-fade blending, or morphing between the two birds; each bird is still or shows only small natural perching movement (no flying or frantic flapping); neither bird shows flicker, warping, duplication, or transparency glitches at any point.

Scientific and Causal Correctness rubric:
level_1: Either bird's plumage contradicts its identity: the Amazon Macaw appears muted, single-toned, or grey-dominated instead of showing its red/blue/yellow pattern, or the Congo Parrot appears green, multicolored, or otherwise non-grey-bodied; or both birds show matching coloration; or the Congo Parrot's tail is any color other than red.
level_2: One bird shows its correct species-typical plumage while the other does not; or the correct plumage patterns appear but in reversed order (Congo Parrot shown before Amazon Macaw); or the two birds are shown at a similar apparent body size, with no visible size difference, even though a Scarlet Macaw is roughly two to three times the body length of a Congo African Grey Parrot.
level_3: The Amazon Macaw (Scarlet Macaw) appears first, showing a vivid red head and upper back, blue rump and flight feathers, a yellow-to-orange patch at the wing bend, and bare white facial skin, at a clearly large body size; the Congo Parrot (Congo African Grey Parrot) appears second, showing an overall ash-grey body with pale scalloped feather edging and a solid crimson-red tail, at a visibly smaller body size than the Amazon Macaw shown just before it; the order is strictly Amazon Macaw then Congo Parrot.
level_4: All level-3 conditions are met, and in addition: beak shape, head profile, and eye-ring markings match each species with no anatomical mismatch; feather texture and sheen read as living plumage rather than a flat, cartoonish, or plastic surface; the Congo Parrot's grey tone is not washed out or tinted toward green or blue in a way that obscures its grey identity.
level_5: All level-4 conditions are met, and in addition: the Amazon Macaw's body shows no grey-dominant patch, and the Congo Parrot's body shows no green, blue, or yellow patch anywhere except within its red tail; the Congo Parrot's tail stays fully visible, solid red, and correctly positioned at the rear of its body; no lighting-induced color cast shifts the Congo Parrot's grey toward green or the Amazon Macaw's plumage toward grey.

Spatiotemporal Consistency rubric:
level_1: Either bird abruptly appears or disappears (teleports) instead of entering or being cleanly cut into the shot; the background, lighting, or camera angle changes abruptly between the Amazon Macaw shot and the Congo Parrot shot; a visible jump cut or dropped-frame glitch occurs; either bird shows an anatomically impossible break, such as a split body, a detached head, or a floating wing.
level_2: The perch or background object appears at a different apparent size between the two shots despite representing the same physical object; light direction or brightness changes abruptly between the two bird presentations; a bird's shadow is missing, inconsistent with a single light source, or flips side abruptly; either bird's movement looks like rigid sliding or non-biological translation rather than perching or turning.
level_3: Both birds are shown against the same static background with the same lighting direction and brightness; the switch from Amazon Macaw to Congo Parrot has no jump cut, overlap, or morphing between the two birds (a plain cut, fade, or held transition is fine); each bird keeps a stable posture and a consistent spatial relationship to its perch or background throughout its own shot; neither bird's body shows warping, stretching, or structural breaks.
level_4: All level-3 conditions are met, and in addition: there is no flicker or strobing that would interfere with judging plumage color; neither bird's proportions are stretched or skewed by perspective distortion; each bird's shadow keeps a consistent softness and direction relative to its own body throughout its shot.
level_5: All level-4 conditions are met, and in addition: any motion shown (a head turn, a blink, a small weight shift on the perch) looks like natural, biomechanically plausible bird movement rather than robotic or looping motion; neither bird shows ghosting or a double-exposed duplicate from one frame to the next; the background behind each bird shows no visible camera drift, zoom, or panning motion between the two shots.