三隻黑禿鷲（？）在街上方盤旋；Gemini最穩定、可靠
Black Vulture (?) in the Sky 11/14/2025 ，在家門口拍的，一共有3隻。
用上麵這張從下麵的視頻裏的截圖，我問Gemini， grok and chatgpt "Name of the bird and why the name is correct?"。通過一張照片，一個同樣的問題，在3天裏問3個不同的AI公司，得出的結論是Gemini最穩定最可靠（給出同樣的鳥名），chatgpt居中（給出2個鳥名），grok穩定性可靠性最差（給出3個鳥名）。
我問過它們3次，Gemini3次都給出同樣的回答：Black Vulture； grok給出3次不同的回答（11/14/2025:Bald Eagle (Haliaeetus leucocephalus); 11/23/2025:Black Eagle (Aquila verreauxii); 11/25/2025:Zone-tailed Hawk (Buteo albonotatus))； chatgpt給出2個不同的回答（11/23/2025：Black Vulture；11/24/2025：Bald Eagle；11/25/2025：Bald Eagle (Haliaeetus leucocephalus)
下麵是11/14/2025 三家的回答（選自我11/14/2025剪輯原照時記錄下的word的文件）：
Gemini:
That is likely a Black Vulture.
It is a type of vulture, which is a scavenger bird, not an eagle or a hawk, though all are raptors.
The key field mark visible in your photo is the contrast of the black underwing coverts (the inner part of the wing closest to the body) against the distinct white patches on the primary flight feathers (the wing tips). This two-toned underwing is a classic feature of the Black Vulture in flight.
Other clues that suggest a Black Vulture over a hawk or eagle are:
- The overall dark or black body plumage.
- The broad, rounded wings.
- The relatively short tail.
Some hawks or eagles can look dark, but the specific pattern of a dark wing contrasting with large white patches at the wingtips strongly points to the Black Vulture.
Chatgpt:
Most likely: Black Vulture
Here’s why:
- Distinct white wingtips on otherwise dark wings — a classic Black Vulture feature.
- Short, squared-off tail (eagles and hawks have longer, more fanned tails).
- Flat-winged soaring posture (eagles usually soar with slightly raised wings; turkey vultures with a strong V-shape).
Why it’s not an eagle:
- Eagles have broad, evenly colored wings without the sharp white “hand” patches you see here.
- Their tails are longer and more proportioned.
Why it’s probably not a turkey vulture:
- Turkey vultures show a strong V (dihedral) when soaring.
- Their wings have more extensive two-tone (light from mid-wing outward), not just bright white tips.
Conclusion:
Black Vulture (Coragyps atratus)
Grok:
The bird in the image is a Bald Eagle (Haliaeetus leucocephalus).
Key Characteristics:
- Appearance:
- Adults have a distinctive white head and tail, with a dark brown body and wings.
- Yellow beak and feet.
- Large, powerful build with a wingspan of 6–7.5 feet (1.8–2.3 meters).
- Behavior:
- Apex predator, primarily feeds on fish but also hunts small mammals, birds, and carrion.
- Known for soaring flight and keen eyesight (can spot prey from miles away).
- Builds massive nests (up to 10 feet wide) in tall trees or cliffs.
- Symbolism: National bird and symbol of the United States, representing strength, courage, and freedom.
- Habitat: Found near large bodies of water (lakes, rivers, coasts) across North America.
下麵是11/24/2025 三家的回答（選自我11/24/2025貼的YouTube的視頻）：
Grok identified this as Black Eagle (Aquila verreauxii)
Gemini identified this as Black Vulture (Coragyps atratus)
ChatGPT identified this as Bald Eagle
下麵是11/25/2025 三家的回答：
1. Gemini的回答：
Based on the appearance in the image, the bird is a Black Vulture (Coragyps atratus).
The name is correct due to the bird's distinctive field marks visible in flight:
-
"Black": The body and most of the underwing feathers are a uniform dark, blackish color.
-
Distinctive White Patches: The bird displays conspicuous white or silvery patches on the undersides of the wingtips (the primary flight feathers), which contrast sharply with the otherwise black wings. This is a key feature that distinguishes the Black Vulture from the similar Turkey Vulture, which has pale/silvery feathers along most of the trailing edge of its wings, not just the tips.
Additionally, while harder to judge from the photo, Black Vultures have a shorter tail and broader wings than Turkey Vultures, giving them a more compact silhouette and requiring them to flap their wings more frequently while flying, compared to the steadier, more teetering flight of the Turkey Vulture. The wings are also typically held flat while soaring, or only in a very slight "V" shape.
2. Grok 的回答：
The bird in the photograph is a Zone-tailed Hawk (Buteo albonotatus).
Why this identification is correct:
- Silhouette and flight posture: Broad, rounded wings and a relatively long tail typical of the genus Buteo (broad-winged hawks).
- Distinctive wing pattern: Dark gray-black body and wing linings with prominent white bands on the flight feathers (visible on the underwing and tail). Zone-tailed Hawks have two or three bold white bands on the tail (often visible from below) and pale grayish-white flight feathers that create strong contrast when the wings are spread.
- Turkey Vulture mimicry: The overall dark body, pale flight feathers, and habit of soaring with wings held in a slight dihedral (V-shape) make it look strikingly similar to a Turkey Vulture from a distance. This is a well-known characteristic of the Zone-tailed Hawk — it deliberately mimics the appearance and flight style of the harmless Turkey Vulture to approach prey unnoticed.
- White tip on tail and banded pattern: The visible white terminal band and the darker subterminal band on the tail are diagnostic of Zone-tailed Hawk (especially in adults).
No other North American raptor consistently shows this exact combination of dark body, boldly pale-banded flight feathers, and Turkey Vulture–like appearance in flight. Common Black Hawk has a very different wing shape and a broad white tail band with only one black band, while juvenile Gray Hawks lack the strong pale barring on the flight feathers.
So, with high confidence: Zone-tailed Hawk (Buteo albonotatus).
3. chatgpt回答：
This bird appears to be a Bald Eagle (Haliaeetus leucocephalus).
Here’s why that identification is correct based on the features visible in your photo:
1. Distinctive white head and tail
Even from a distance, you can clearly see:
-
A bright white head
-
A white tail
These two features together are the strongest field marks of an adult Bald Eagle.
2. Dark body and wings
The body and wings are uniformly dark, which matches the adult Bald Eagle’s plumage.
3. Broad wings held in a shallow “V” while soaring
Bald Eagles often soar with:
-
Long, broad wings
-
A very slight dihedral (shallow V)
Your photo shows this exact posture.
4. Wing pattern fits Bald Eagle
The wings show:
-
Pale “windows” on the inner primaries
-
Lighter edges toward the wingtips
There were 3 of them, over our street
Camera: Olympus SZ-15
Software:
Cutted by Adobe Premiere 2024
Sharpened by Magix Video Deluxe 2026
Grok identified this as Black Eagle (Aquila verreauxii)
Gemini identified this as Black Vulture (Coragyps atratus)
ChatGPT identified this as Bald Eagle
https://www.youtube.com/watch?v=OYZ2MpjWHAc
