Silvery-cheeked Hornbill (Bycanistes brevis)
About the Silvery-cheeked Hornbill
The silvery-cheeked hornbill (Bycanistes brevis) is a large species of hornbill found in Africa. Silvery-cheeked hornbills are residents of the tall evergreen forests of East Africa from Ethiopia to South Africa. In Zimbabwe it is threatened by habitat destruction and its presence in South Africa is marginal, but it remains locally fairly common, especially in the northern and central parts of its range. It measures 75 to 80 centimetres (30 to 31 in) in length, and has a very large cream-colored casque on the beak. The head is silver-grey and the rest of the plumage is iridescent black, except for the white rump, lower back, thighs, vent and tip of the outer tail-feathers. The sexes are similar except the female has a smaller casque and reddish skin around the eyes. Diet.
Ecology and behavior
As a member of Bucerotidae, this bird is associated with the habitats typical of this family, including forest edges, open growth, wetlands or dense cover. It generally feeds by food resources appropriate to its size and bill type. These habits determine where the bird is easiest to observe and explain why a recording often gives the first clue to its presence. Recorded examples on this site are linked to Tanzania. Local vegetation and weather can change the impression of the voice, but field identification still depends on the same evidence: the perch, surrounding cover and behavior of the calling bird.What to listen for
Listen first for rhythm, then tone, then pitch direction and spacing. The available recordings are labeled as call. On the first listen, follow repetition and phrase length. On the second, decide whether the tone is clear, buzzy, burry, harsh, rounded or thin. On the third, trace pitch direction and the gaps between phrases. A strong field note describes the complete sound before naming the species. Note whether the bird stays hidden or uses an exposed perch, whether phrases accelerate, and whether the voice belongs to a boundary between two habitats. Those details make the recording useful during a real encounter.A field note on this voice
Listening context
The recordings shown here come from Tanzania. Because exact recording dates are not available for this conservative note, it is best not to treat any month or season as guaranteed. Local weather, latitude, habitat and breeding cycles can all change when a bird is most vocal. Use the region as a starting point, then look for supporting evidence in the field. Habitat, perch height, light conditions and observed behavior often provide more reliable context than a broad seasonal guess.
Time of day
The exact recording time is not available for this sample. Early morning is often a productive time to listen because many birds sing more regularly then and sound may carry well, but that is a general observation rather than a rule for this species. Birds may also vocalize later while feeding, moving through cover, interacting with nearby individuals or responding to disturbance. Listen for the same kinds of sounds at different times and compare the surrounding behavior.
What this vocalization may suggest
This page contains call. Songs are often longer, more structured and more repetitive than short calls. A clear phrase repeated at regular intervals can be associated with breeding activity or the defense of space, although the exact meaning should be confirmed by observation. Shorter or more abrupt notes may accompany movement, alertness or contact between birds. Changes in pace, volume or tone can sometimes reflect heightened interaction, while an evenly spaced delivery may simply be routine.
Understanding pitch
High notes do not automatically indicate courtship, and low notes do not necessarily signal alarm. Pitch works alongside rhythm, repetition, volume and tone. A high, clear phrase may be a territorial song, while high, irregular notes might suggest agitation; some low, soft sounds may simply help birds stay in contact. Rather than focusing on pitch alone, observe what the bird is doing before and after the sound. The most useful field note combines the voice with place, habitat, time and behavior.
Editor's note
These interpretations are intended as listening guidance based on the available recordings and context, not as proof of an individual bird's intent. When exact dates or times are unavailable, this note deliberately avoids claiming them. Strong observations record the date and time, habitat, perch height, weather and behavior before and after the vocalization.
A real field recording of the Silvery-cheeked Hornbill. Press play and focus on the rhythm and pitch of each phrase.