Other species, like the "tiúba" and the true "uruçu", are also very tame and highly productive. Their colonies have from 3000–5000 individuals (for comparison, the population of honeybee swarms can peak at 80000 individuals) and can produce up to 10 liters (2.6 US gallons) of honey a year. They can be easily kept at home but will survive only in regions with a warm climate, their larvae dying at temperatures lower than 12 °C (54 °F). The yellow "uruçu", however, can survive at temperatures lower than 0 °C (32 °F), and their colonies, bearing about 3500 individuals, can produce up to 6 liters (1.5 US gallons) of honey a year. But this species will react with powerful nipping if its nests are molested, and usually they are only kept by professional meliponicultors.