Tigers are opportunistic carnivores apex predators that consume a wide variety of animals, including wild boar, deer, tapir, and livestock. Although toucans are not primary prey for tigers, it is possible that a tiger could kill and eat a toucan if the bird is vulnerable.
Toucans are diurnal, or active during the day, while tigers are mostly active at night, or nocturnal. This means that the possibility of a tiger encountering a toucan is limited to the early morning or late afternoon when both species may be active.
Toucans are brightly colored and relatively noisy birds, which makes them easily detectable to predators. Tigers are also quite agile and are capable of climbing trees, although they do not usually do so to hunt. If a tiger were able to catch a toucan, it is likely to consume the bird, although the nutritional value of a toucan is likely to be low compared to other prey.
In conclusion, although it is possible for a tiger to eat a toucan, it is not a common occurrence and is more likely to occur if the tiger is particularly desperate or the toucan is vulnerable.