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New Caledonian Crows are known for creating and using tools to extract insects from tight spaces.

Scrub Jays demonstrate episodic-like memory when they remember where they hid food for later retrieval.

Rats have been shown to navigate mazes using their spatial memory, which can be studied in experiments with different types of mazes such as water mazes.

Elephants have passed the mirror test, suggesting a level of self-awareness and cognitive abilities related to the recognition of their own reflection.

Chimpanzees use problem-solving strategies such as stacking boxes to reach food suspended from the ceiling, demonstrating their ability to plan and solve complex tasks.

African Grey Parrots, like Alex, have shown the ability to understand and use human language to an extent, demonstrating complex communication skills.

Rhesus monkeys can be trained to understand basic arithmetic operations and can perform tasks requiring counting and numerical comparison.

Meerkats have shown the ability to learn from observing the actions of group members, particularly in the context of foraging and avoiding predators.

Dogs are capable of solving detour problems, such as navigating around a V-shaped fence to reach a reward, demonstrating their ability to find solutions to obstacles.

Studies with horses have shown that they can interpret human emotions based on expressions, indicating emotional intelligence and social sensitivity.

Pigeons have demonstrated the ability to categorize images by general concepts, like 'tree' or 'chair', which suggests they can form abstract concepts.

Chickens show the ability to make transitive inferences, as exhibited by their capacity to decipher pecking order without having to directly interact with every member of the group.

Dolphins have the ability to imitate both sounds and physical behaviors, showing a complex level of social learning and intelligence.

Squirrels will adjust their cache protection strategies based on the perceived risk of theft, an example of their ability to assess risk and adapt behavior accordingly.

The foraging behavior of bees can be explained by the optimal foraging theory, where they choose flowers that maximize their energy intake while minimizing the energy spent foraging.

Rats demonstrate an understanding of timing and sequence by pressing levers in a specific order and duration to obtain a reward, which requires them to learn sequences and intervals.

Dogs are able to wait for a more desirable treat rather than opting for an immediately available lesser one, demonstrating their inhibitory control capacity.

Pigeons have been shown to recognize and discriminate between different patterns and artworks, suggesting an ability to detect and process complex visual patterns.

Crows and Ravens understand causality and can use it to solve puzzles, such as dropping stones into a water-filled tube to raise the water level and access a floating reward.

Orangutans have displayed innovative behavior when faced with novel problems, such as inventing new methods to extract food from complex apparatuses.

Chickens can be trained to peck at certain colors or shapes, thereby demonstrating their ability to selectively attend to particular aspects of their environment.

Sea slugs, such as Aplysia, show associative learning by forming connections between neutral stimuli and defensive reflex actions like the withdrawal reflex.

Baboons can learn to categorize stimuli, such as English words and non-words, indicating the ability for abstract categorization beyond their ecological needs.

Parrots, like the kea, have demonstrated problem-solving involving understanding of physical properties, such as using weights to gain access to food from a balance scale.