What do you mean by scutes ?

Explanation

### Step-by-Step Text Solution

1. **Definition of Scutes**: Scutes are bony external plates or scales that are overlaid with a layer of horn. They are also referred to as scutum.

2. **Location of Scutes**: Scutes are found in various animals, including:
- The shells of turtles
- The skin of crocodilians
- The feet of certain birds
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