When are adult raptors most likely to desert a nest?

Adult raptors are most likely to desert a nest just prior to laying eggs. This is a critical time when the pair is assessing their environment and confirming the suitability of the nesting site. If they sense any disturbances or threats, they may abandon the nest before laying begins to ensure their reproductive success is maximized.

Desertion during the other stages, such as late incubation or hatching, is generally less common because the parents have already invested significant energy and resources into the nest by that point. Once they have eggs or nestlings, the instinct to protect and rear their young kicks in, making them less likely to abandon the nest. Prior to fledging, the young birds are also becoming more independent and the parents are usually focused on ensuring their survival during this vulnerable period. Thus, the likelihood of abandonment is highest before the actual egg-laying occurs.