In birds, the pigment responsible for black and gray colours of feathers, is

Options

A. Phaeomelanin
B. Porphyrin
C. Eumelanin
D. Turacoverdin

Answer

To answer the question regarding the pigment responsible for black and gray colors of feathers in birds, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question presents several pigments as options. We need to analyze each one to determine which is responsible for black and gray coloration in birds.

2. **Evaluate Each Pigment**:
- **Fecomeline (or Femelanine)**: This pigment is known for providing pinkish or reddish colors. It is not responsible for black or gray colors.
- **Porphyrin**: This pigment is associated with hemoglobin and is involved in binding iron with oxygen. It does not contribute to black or gray feather coloration.
- **Eumelanin**: This is the key pigment that provides black and gray coloration to feathers. It is specifically responsible for these darker shades in birds.
- **Turacoverdine**: This pigment is responsible for bright green coloration, found in certain birds like parrots. It does not contribute to black or gray colors.

3. **Conclusion**: Based on the evaluation, the pigment responsible for black and gray colors of feathers in birds is **Eumelanin**.

4. **Final Answer**: Eumelanin is the pigment responsible for black and gray colors of feathers in birds.