Communication: They communicate by a series of whistles and clicks, and though experts are unsure of how complex this communication is, individual dolphins can definitely recognise and respond to each other. Like all dolphins, they use echolocation to form a 'picture' of their surroundings in murky water. They emit a series of loud clicks which travel through the water - if the sound hits a solid object, an echo is bounced off it and returns to the dolphin, which is then able to interpret the sounds into a map of its surrounding environment.
Breeding: Bottle-nosed dolphins mate in the spring and summer, and females give birth to single calves about 10-12 months later. Although they are capable of giving birth unaided, two or more 'midwives' often help with the delivery by tugging at the newborn's tail and whistling encouragement. They also protect the vulnerable mother and her calf from sharks.Read More: Dolphins and Humans