What is the primary reason for inaccurate data on Peregrine Falcon incubation periods in older sources?

The primary reason for inaccurate data on Peregrine Falcon incubation periods in older sources is technological limitations. Earlier research relied heavily on methods that were not as precise or advanced as those available today. For instance, the use of older tracking and monitoring technologies meant that researchers couldn't observe the birds as closely or gather as much detailed information about their breeding behavior, including incubation periods. With advancements in technology such as better telemetry, camera traps, and non-invasive observation techniques, researchers can now obtain more accurate estimates of incubation durations and other critical aspects of Peregrine Falcon breeding.

This advancement underscores the fact that earlier studies may have produced data based on fewer observations or less reliable methods, leading to variations and inaccuracies in reported incubation periods. Consequently, the technological limitations of past research efforts directly contributed to the inaccuracies in older sources regarding Peregrine Falcon incubation durations.