Ranging from a low hum to a mew and even shrieks, these sounds are so abundant that submariners have exploited them to camouflage their own operational noises.
فعندما يحطّ الطائر على الشجرة او قربها ،‏ يطلق صيحة مختلفة تقول :‏ « العسل قريب » .‏