African elephants produce a sound from very low frequency, known as infrasound. As this frequency is too low for a human to hear, an image depicting a whisper would be as close as possible to see this occur. On a serious note, winter is often a short season in the lowveld of South Africa and it can produce some iconic moments, that are not often encountered.
An elephant also uses its trunk to smell, raising it up in the air and swivelling it like a periscope, it can determine the location of fellow elephants and food or alternative water sources. As warm air was moving out of the trunk on a very cold morning, a misty cloud that could be described as an elephant whisper drifted off the tip of the trunk.