The white matter in bird droppings consists of large amount of _________.

Answer

To solve the question regarding the white matter in bird droppings, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Excretion in Birds**:
- Birds excrete waste differently compared to mammals. They primarily utilize a process called uricotelism.

2. **Identify the Form of Nitrogenous Waste**:
- In uricotelism, birds excrete nitrogenous waste in the form of uric acid rather than urea or ammonia. This is a crucial distinction as it affects the composition of their droppings.

3. **Recognize the Appearance of Bird Droppings**:
- Bird droppings typically consist of two components: a dark, liquid portion (which is primarily fecal matter) and a white, pasty portion. The white matter is specifically the nitrogenous waste.

4. **Conclude the Composition of the White Matter**:
- Since the white matter in bird droppings is primarily composed of the nitrogenous waste that birds excrete, we can conclude that it consists of a large amount of uric acid.

### Final Answer:
The white matter in bird droppings consists of a large amount of **uric acid**.

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