This maintains the heat transfer between steam and liquid to a maximum. Figure 3 shows a temperature profile when saturated steam is used. The difference with the previous diagram is that there is now a layer of condensate on the heating surface and steam temperature is constant.
As a general rule Owls are monogamous - pairs are comprised of one male and one female, neither one of which has any involvement with other nesting birds. With some Owl species the pair bonds last only for the duration of the breeding season, especially if the species involved is dispersive or migratory.
The month-long incubation period starts once the owl lays the first egg. The female owl takes care of the chicks until they are old enough to leave the nest at approximately 3 months old. Female screech owls follow a similar pattern, but their chicks can start leaving the nest earlier at around 2 months old.