When is desertion of the nest by adult raptors most likely to occur?

Desertion of the nest by adult raptors is most likely to occur just prior to egg laying due to various factors related to breeding behavior. During this time, the adult raptors assess environmental conditions and potential threats to nesting success. If the conditions are unfavorable, such as the presence of predators or human disturbances, the adults may abandon the nesting site to avoid losses.

Additionally, this period marks a crucial time when the adults are establishing their nesting territories and ensuring that they will be suitable for raising offspring. If they abandon the nest before laying eggs, it may be a strategic decision to seek out a safer location to increase the chances of successful breeding.

The other options represent periods where the adults typically remain committed to the nesting process, as they have invested considerable time and energy into incubation and the care of their young.