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The pygmy killer whale (Feresa attenuata) is a poorly known and rarely seen oceanic dolphin. [3] It is the only species in the genus Feresa.It derives its common name from sharing some physical characteristics with the orca, also known as the killer whale.
Whale vocalizations are the sounds made by whales to communicate. The word "song" is used in particular to describe the pattern of regular and predictable sounds made by some species of whales (notably the humpback and bowhead whales) in a way that is reminiscent of human singing. Humans produce sound by expelling air through the larynx.
Kogiidae is a family comprising at least two extant species of Cetacea, the pygmy (Kogia breviceps) and dwarf (K. sima) sperm whales.As their common names suggest, they somewhat resemble sperm whales, with squared heads and small lower jaws, but are much smaller, with much shorter skulls and more notable dorsal fins than sperm whales. [2]
In the darkness, the ocean animal was initially misidentified as a finless porpoise, Bakan said. “Later on, marine mammal experts confirmed the species as (a) pygmy killer whale.”
The whales come in so close sometimes we can actually hear their blows." Citizen researchers like these have become powerful eyes and ears on the ground for marine scientists, says wildlife ...
Humpback whale, sound spectrum and time plots. Whales occupying the same geographical areas (which can be as large as entire ocean basins) tend to sing similar songs, with only slight variations. Whales from non-overlapping regions sing entirely different songs. [12] As the song evolves, it appears that old patterns are not revisited. [12]
Like all toothed whales, the pygmy sperm whale hunts prey by echolocation. Sound produced for echolocation by many odontocetes come in the form of high-frequency clicks. [20] The frequencies it uses are mostly ultrasonic, [16] peaking around 125 kHz. [20] The clicks from their echolocation has been recorded to last an average of 600 microseconds.
The shape of the head, flippers and dorsal cape can be useful diagnostic features. Melon-headed whales have flippers with sharply pointed tips whereas pygmy killer whales have rounded flipper tips, and viewed from above, the head shape is more triangular than the rounded head of the pygmy killer whale. [8]