# 旅鸽卡面图片来源记录

- 日期：2026-11-02（Asia/Shanghai）。
- 制作：BirdGacha / OpenAI ImageGen，使用内置 image_gen 工具，透明背景。
- 内容：成年雌性旅鸽（Ectopistes migratorius）的 AI 艺术复原，供卡面使用。
- 图片不是历史照片，不声称精确复原玛莎这一特定个体，也不是用于科学鉴定的形态图。
- 新图不沿用旧卡通 SVG 的 CC0 标注，也不标为 huashu-bird-sticker 原仓库贴纸。

## 文件与交付

| 文件 | 尺寸 | 大小 | 用途 |
| --- | --- | ---: | --- |
| `ectopistes-migratorius-optimized.webp` | 603×640 | 53,054 B | 卡面与详情展示，WebP quality 82 |
| `ectopistes-migratorius.webp` | 1218×1292 | 219,630 B | 高清卡片导出，WebP quality 90 |
| `ectopistes-migratorius.png` | 1218×1292 | 1,231,094 B | 原始透明 PNG，后续重新编码来源 |

WebP 保持透明通道和原始宽高比，不裁切、不添加背景。展示图相对原 PNG 减少约 95.7% 体积。复现命令：在仓库根目录运行 `node analysis_scripts/optimize_passenger_pigeon.cjs`。

`birdImageSources` 已支持 `-optimized.webp` → 高清 `.webp` 的导出路径；旧 SVG 继续作为图片失败时的回退，未删除。

## 参考资料

1. [Wikipedia — Passenger pigeon / Description](https://en.wikipedia.org/wiki/Passenger_pigeon#Description)：参考成年雌鸟的灰褐色头背、浅灰褐胸和白腹、折翼黑斑、长楔形尾、橙红虹膜与淡红色足。依据文字形态描述生成，没有把条目图片作为编辑输入。
2. [Wikipedia — Martha](https://en.wikipedia.org/wiki/Martha_(passenger_pigeon))：玛莎是雌鸟，因此宣传片配套素材采用成年雌鸟较淡的配色；这不等于复原玛莎的个体外观。

参考资料的事实与版权归属不因图像生成而改变。本文件记录生成来源，不为 AI 素材附加未经确认的第三方图片许可。

## 最终生成提示词

```text
Use case: scientific-educational / photorealistic-natural.
Asset type: realistic bird artwork for a BirdGacha trading card and a short educational promotional video, isolated on a genuinely transparent background.
Primary request: Create ONE beautiful, anatomically careful reconstruction of a living adult FEMALE passenger pigeon (Ectopistes migratorius), informed by the morphology described in Wikipedia's Passenger pigeon article, Description section, and by the historical fact that Martha was a female. This is an artistic reconstruction of the species, not a photograph of Martha and not a claim of exact individual identity.

Subject and morphology: a slender, elegant medium-sized pigeon, small rounded head in proportion to a streamlined body, narrow short dark blackish bill with a subtle cere, orange-red iris with a fine grayish-blue bare eye ring. FEMALE coloration: grayish-brown forehead, crown, nape and upper back; soft gray-brown/slate wings with clearly visible but irregular BLACK spots on the folded wing coverts. The lower throat and chest are pale buff-gray, transitioning to a light cream-white belly and undertail. Very restrained bronze iridescence at the side of the neck, much less vivid than a male. Long layered graduated wedge-shaped tail, very important for identification: central feathers grayish brown, pale outer tail edges with dark markings; whole tail fully visible and anatomically connected. Slender muted coral-red legs and natural pigeon toes, no bright orange cartoon feet.

Pose and framing: entire bird visible, facing right in a natural slightly three-quarter side view, folded wings, both feet naturally gripping one slender short piece of weathered twig; the twig is only a small support, not an environment. Head, bill, tail tip, toes, and twig all completely within frame with generous clear margins. Graceful alert posture, balanced natural proportions; avoid a bulky short-tailed city pigeon silhouette. Portrait composition suitable for the artwork area of a vertical collectible card, with no card frame.

Style and light: refined photorealistic natural-history reconstruction, life-like feather layering and tiny feather barbs, subtle natural asymmetries, exquisite but believable detail, softly directional daylight showing the volume of the breast and the folded wing. Natural muted colors. The bird must look alive, not taxidermied. Clear clean silhouette and accurate feather edges for compositing over a dark purple card.
Background: true transparent alpha, no sky, no forest, no paper texture, no checkerboard drawn into the pixels, no background shadow.
Text: none. No labels, no border, no logos, no watermark.
Avoid: male passenger pigeon coloration (no rich pink-rufous chest, no vivid blue head), mourning dove substitution, rock pigeon neck pattern, cartoon/vector appearance, huge eyes, parrot bill, broad fantail, clipped tail, extra limbs, extra wings, detached feathers, fantasy colors.
```