A lot of what was earlier considered under animal intelligence is now studied under the heading of animal cognition, or cognitive ethology. Fields of interest in research under this category include attention, categorization, memory and tool use. It is still a controversial area of study. It may be surprising to note that fourth on the animal intelligence list, are pigs. They can be extremely intelligent animals.
On the intelligence rating scale, humans come first, then comes non-human primates. Dolphins are ranked third, and then pigs. Remember that people will always view some animals as being more intelligent than others. For example, in European cultures animals that are seen as intelligent in certain ways unlike other animals are dogs, great apes and horses. More recently they've also added dolphins and parrots to this list.
On the intelligence rating scale, humans come first, then comes non-human primates. Dolphins are ranked third, and then pigs. Remember that people will always view some animals as being more intelligent than others. For example, in European cultures animals that are seen as intelligent in certain ways unlike other animals are dogs, great apes and horses. More recently they've also added dolphins and parrots to this list.
