Pets that are common on the streets vary according to geographic area, economic situation and local culture. However, some common types include:

1. Dogs
Description: Dogs are among the most common animals on the streets, often seen walking alone or in groups.
Reasons for appearing on the street: sometimes they are abandoned by their owners, or ran away from home.
Consequences: Dogs may be exposed to various dangers such as car accidents or diseases.

2. Cats
Description: Cats are very common on the streets, especially in cities. They are often more independent than dogs.
Reasons for appearing on the street: cats can be born on the street, or escape from homes.
Consequences: Cats sometimes breed in groups called "colonies", and have an impact on the local ecosystem.

3. Rabbits
Description: Rabbits can be found on the streets, especially in more rural areas.
Reasons for appearing on the street: sometimes they run away from their owners or are released.
Consequences: Rabbits can cause damage to gardens, but they are also very cute.

4. Birds
Description: Birds such as pigeons or crows are often seen on the streets.
Reasons for appearing on the street: these birds are well acclimatized to life in the city.
Consequences: they contribute to seed dispersal but may also be a nuisance.

5. Other animals
Additional animals such as pigs, mice or even horses can be found on the streets depending on the geographical area and local culture.
Summary
Street pets are a phenomenon that shows the connections between man and animal. Caring for these animals can help improve their lives and improve the local community in general.