Fish: Ammoniatelic , Birds :________

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Ammoniatelic":**
- The term "Ammoniatelic" refers to organisms that excrete nitrogenous waste primarily in the form of ammonia. This is common in aquatic animals like fish, as ammonia is highly soluble in water and can be easily excreted.

2. **Identifying the Excretion Method of Birds:**
- Birds, unlike fish, do not excrete ammonia. Instead, they convert nitrogenous waste into uric acid, which is less toxic and conserves water. This adaptation is crucial for birds, especially those that may not have constant access to water.

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