Intelligent animals exhibit a wide range of cognitive abilities and complex behaviors. Below is an expansion on some of the species mentioned, including examples of things they can do and aspects of intelligence:

1. Chimpanzees
Use of tools: Chimpanzees use branches to catch ants and stick leaves to drink water. They can also use stones to crack nuts.
Social life: They live in groups and have a social hierarchy, indicating a complex understanding of social systems.
Extrinsic learning: Chimpanzees can learn by watching others, a phenomenon known as "imitation learning."

2. Dolphins
Language and Communication: Dolphins use sounds and signs to communicate with each other, and have unique names for each individual in the group.
Problem Solving: They display a high ability in problem solving, such as catching fish in new ways.
Playing: Dolphins are known to play with waves and other animals, indicating a capacity for understanding and enjoyment.
3. Crows
Complex problem solving: Crows can solve difficult problems like getting to food by using different tools in complex sequences.
Memory: They have an excellent memory and can remember people's faces, which helps them avoid predators.
Communication: Crows use vocalizations and body movements to convey information about dangers or food sources.

4. Elephants
Excellent memory: Elephants can remember places, people, and events for many years. This memory helps them survive in the environment.
Emotional consciousness: they show empathy towards their own kind, such as helping injured elephants or grieving over the loss of friends.
Use of group work: They work together to forage for food and protect young from groups of predators.
5. Dogs
Understanding emotions: Dogs can understand human emotions and act accordingly, such as approaching a upset person to comfort them.
Learning commands: Dogs can learn hundreds of different commands and perform complex actions such as searching for objects.
Trust and protection: they show great loyalty to their owners and sometimes even protect them from danger.

6. Cats
Problem Solving Ability: Cats can find ways to get to food or objects they want, even if there are obstacles.
Communication with humans: They use voices, body movements, and facial expressions to communicate with humans.
7. Contents
Imitation of voices: Content can imitate the voices of humans and animals, and sometimes even develop an impressive vocabulary.
Problem Solving: They can solve complex puzzles and understand the principle of cause and effect.

8. Pigs
Fast learning: Pigs are considered highly intelligent and can learn many tricks and understand complicated situations.
Spatial orientation: they have a good ability to understand and orient themselves in different environments.
Summary
Intelligence in animals is diverse and complex, and includes not only cognitive abilities but also social, emotional understanding and interactive behavior. Each species exhibits intelligence in different ways, depending on its needs and environment. These abilities are part of their adaptation to environmental conditions, and they help them survive and develop