Editing Hornbill (section)

=== Fossil record ===
* ''[[Bucorvus]] brailloni'' – Late Miocene (Morocco)<ref name="Brunet, J 1971" />
* ''[[Euroceros]] bulgaricus'' – Late Miocene (Bulgaria)<ref name="Boev, Z. 2007" />
* ''[[Tockus]]'' sp. – Early Miocene (Uganda)<ref>{{Cite journal|url=https://onlinelibrary.wiley.com/doi/10.1111/ibi.12907|doi=10.1111/ibi.12907|title=Bucerotidae from the early Miocene of Napak, Uganda (East Africa): The earliest hornbill with a modern-type beak|year=2021|last1=Riamon|first1=Ségolène|last2=Pickford|first2=Martin |last3=Senut|first3=Brigitte|last4=Louchart|first4=Antoine|journal=Ibis|volume=163|issue=2|pages=715–721|s2cid=230632701}}</ref>

Some scientist believe the hornbill [[phylogenetic tree|evolutionary tree]] spread from the Indian microcontinent after [[Gondwana]], before [[Indian subcontinent#Geology|India merged with Asia]].<ref>{{cite journal |last1=Viseshakul |first1=N. |last2=Charoennitikul |first2=W. |last3=Kitamura |first3=S. |last4=Kemp |first4=A. |last5=Thong-Aree |first5=S. |last6=Surapunpitak |first6=Y. |last7=Poonswad |first7=P. |last8=Ponglikitmongkol |first8=M. |title=A phylogeny of frugivorous hornbills linked to the evolution of Indian plants within Asian rainforests: Frugivorous hornbills link to evolution of Asian rainforests |journal=Journal of Evolutionary Biology |date=July 2011 |volume=24 |issue=7 |pages=1533–1545 |doi=10.1111/j.1420-9101.2011.02285.x|pmid=21545425 |doi-access=free}}</ref><ref>{{cite web |title=Forest guardians in the Western Ghats |url=https://www.researchgate.net/publication/318339218 |date=January 2017}}</ref>