Adders lack ears to hear, but they are highly attuned to vibration, which they sense through their lower jaws.
"They can hear sounds at distances much farther away than previously thought, even though they lack ears with the eardrums typical of most animals with long-distance hearing".
In addition, many insects lack ears and/or the wings of resting prey (such as moths) cover the ears, reducing the prey's acoustic sensitivity (Faure and Barclay, 1994) and potentially confounding their auditory defences.
The appearance of the American grey squirrel in a Withington garden might well cause surprise, but the lady who reports it evidently knows this animal, which is rather larger than our familiar red squirrel, is grey in colour, and lacks ear-tufts.
Its large rounded head lacks ear tufts, and the facial disc surrounding the dark brown eyes is usually rather plain.
Their ears, which lack pinna, are located on the sides of their head.
He was expelled from Peabody, he said, for being "incorrigible, untalented and entirely lacking in ear".
Some journalists were quick to jump on the apparent connection of the massacre to violent entertainment and Nazism, though one wrote, "Lyrically, the band has written some songs that could easily be misconstrued by anyone lacking an ear for irony and looking for an excuse to commit violence".
But 4% of the moths they studied lacked such ears, and are thus reckoned to be deaf.
Pinnipeds are visual predators, and, even though they may lack external ears, they generally have excellent hearing, especially underwater.
