The scientific name of hornbills is Tockus, because of the sound they make: tok-tok-tok… In many African languages they are called toko or koko. The call of Red-billed is difficult to tell from Yellow-billed’s. But, at the end of the song, Red-billed starts giving double notes – can you hear it? I recorded this on a blazing hot summer afternoon in the Bushveld. BTW, Damara Red-billed sounds the same as Southern Red-billed.