Family Bucerotidae (Hornbills)
• Oriental Pied Hornbill (Anthracoceros albirostris) - R/RB - CF, Changi Beach, PU, SJ, Woodleigh
• Northern Pied Hornbill (Anthracocercos malabaricus) - VR/Es - SL
• Rhinoceros Hornbill (Buceros bicornis) - Ex/RB, VR/Es - BT
• Great Hornbill (Buceros rhinoceros) - VR/Es - BT
• Helmeted Hornbill (Rhinoplax vigil) - Ex/RB
• White-crowned Hornbill (Aceros comatus) - VR/Es
• Bushy-crested Hornbill (Anorrhinus galeritus) - VR/Es
• Black Hornbill (Anthracoceros malayanus) - VR/Es
• Southern Ground Hornbill (Bucorvus leadbeateri) - VR/Es