It was a white admiral butterfly with tattered wings, well past the breeding cycle.
Spring migration is performed much more rapidly than in the fall owing to pressures of the breeding cycle.
The breeding cycle of many gruiform birds begins with elaborate courtship rituals and displays.
Once initiated, the breeding cycle is extremely rapid, and requires only 17 days from egg-laying to fledging of young.
Most prominently, early in the breeding cycle of American Crows the females will give begging calls frequently.
If she is coming into heat, the buck will stop at nothing to find her, and shadow her every step until they complete the breeding cycle.
The peculiar three-year breeding cycle of the kings ensures that penguins at all life stages can be found at any given time at a single rookery.
And the eight to 10 pairs of Baltimore orioles that have chosen to nest in the park are well into their breeding cycle by then.
Tian Tian's hormone levels are returning to normal and her behaviours signal the end of her breeding cycle for this year," Valentine said.
The molt cycle, however, appears to be independent of the breeding cycle, and the flight feathers are renewed only once a year.
Such a procedure is very laborious due to a long breeding cycle (5-6 yeand) and a small litter size (1 per birth) in macaque monkeys.
