From the deafening roar of lions to the haunting howls of wolves, the animal kingdom is alive with an array of loud calls.

Filmed in the Sabi Sand Wildtuin, Greater Kruger National Park, South Africa A roar is a deep, bellowing outburst of sound ...

It is produced by animals of certain species ... low frequency loud tones and a final segment which sounds much like grunting. The lion's roar is familiar to many through its inclusion in the ...

Most animals have triangular vocal cords but a lion’s are square and flat ... helped by swivelling ears that adjust to the direction that sound is coming from. Their sensitive hearing means ...