Here are some other terms used to describe the sounds humpback whale calves make:
* "Whistle" is the most common term used to describe the high-pitched sounds they make.
* "Chirp" is another term used to describe the sounds, which can be short and sharp or long and drawn-out.
* "Click" is a term used to describe the short, sharp sounds that calves make.
* "Pulses" are a series of clicks that are often used in echolocation.
These sounds are crucial for the calves' survival, as they help them to stay close to their mothers, learn to navigate, and find food.