Great Hornbill
Buceros bicornis
The great hornbill is a large bird, 95–130 cm (37–51 in) long, with a 152 cm (60 in) wingspan and a weight of 2 to 4 kg (4.4 to 8.8 lb). The average weight of males is 3 kg (6.6 lb) whereas that of females is 2.59 kg (5.7 lb). It is the heaviest, but not the longest, Asian hornbill. With the separation of the ground hornbills into a separate family, Bucorvidae, the great hornbill reigns as the heaviest of all typical hornbills. Females are smaller than males and have bluish-white instead of red eyes, although the orbital skin is pinkish. Like other hornbills, they have prominent "eyelashes".
ID text from Wikipedia, CC BY-SA 4.0
Rhinoceros Hornbill
Buceros rhinoceros
The rhinoceros hornbill is a large arboreal hornbill, 80 to 90 cm (31–35 in) long. The weight varies by sex, with males weighing around 2,465 to 2,960 g (87.0–104.4 oz) and the females 2,040 to 2,330 g (72–82 oz). The plumage is predominantly black, with white legs and vent and a white tail with a black band. The huge bill and casque are orange and red, the colour coming from preen oil rubbed on from the preen gland above the tail. The eyes of the male are red with black rims, and white with red rims in the female.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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