The sentences contain grammatical errors and can be improved for clarity. Here is the analysis and rephrasing:
1. **Original Sentence:**
- "I fed the birds twice a day; first in the morning a, and in the later afternoon."
- **Issues:** The "a" after "morning" is likely a typo. The phrase "in the later afternoon" is somewhat awkward and can be simplified.
**Rephrased:**
- "I fed the birds twice a day: first in the morning and then in