Yes, dolphins do eat birds, but this is not as common as one would think. In fact, most dolphin species prefer feeding on fishes, squid, crabs, octopuses, and other dolphins. However, in case these animals are not available, dolphins turn to hunt birds and other aquatic species such as penguins, seagulls, and so on. 

Yes, dolphins think and are quite intelligent with their specialized brain cells and perpetually active brains. They have spindle neurons that help them perform complex tasks such as remembering, reasoning, adapting, communicating, recognition, and so on. They are often considered to be among the most intelligent oceanic species, along with whales. 

Yes, dolphins have bones just like humans and whales do. However, their bone structure is far less complex and lighter than that of humans. The bones of dolphins lend them tremendous balancing power, and they are able to easily navigate deep ocean waters. 

The Dolphin, like other mammals, needs air to function. So, instead of nostrils, the dolphin has a blowhole at the top of its head. When they come to the surface the blowhole opens, allowing them to breathe. Once under the surface, the blowhole closes. 

Dolphins eat crabs and other crustaceans, but there are a number of factors that determine a dolphin’s feeding habits. The environment in which they live as well as the availability of different marine creatures influences the dietary habits of a dolphin, who feeds on fishes, squid, jellyfish, sharks, whales, and other dolphins. 

Dolphins eat seals, but that is not their primary source of nutrition. Instead, dolphins prefer feeding on fishes such as sawfish, cod, mackerel, herring, and the likes. They also feed on sharks, whales, and baby dolphins. Dolphins are dangerous animals who kill for the sake of it, even when they are not actively looking for prey.