Apart from obtaining food by catching it in the air, Frigate (frigatebird) also has other ways of obtaining food, namely by robbing or seizing it from other birds. Frigates have kleptoparasite behavior which they have been trained to do since childhood.
Kleptoparasites are a behavior in which they bully other birds to forcibly surrender their food. When another bird drops its food, the Frigate dashes quickly to catch it before it falls into the water. This is the uniqueness of the pirate Frigate (frigate bird) which can sleep while flying.
