Which type of mammals show oestrous cylce?

Explanation

### Step-by-Step Solution:

1. **Understanding the Oestrous Cycle**: The oestrous cycle, also known as the reproductive cycle, is characterized by a period of reproductive activity in female mammals. Unlike the menstrual cycle, which involves monthly bleeding, the oestrous cycle is seasonal and does not involve a monthly blood flow.

2. **Identifying the Characteristics**: The oestrous cycle indicates that the female is in a period of fertility and is ready for mating. This cycle is typically observed in non-primates.

3. **Distinguishing Between Mammal Types**: Mammals can be broadly categorized into primates and non-primates. Primates, which include humans, monkeys, and apes, exhibit a menstrual cycle rather than an oestrous cycle.

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