Final answer:
A causal ontogeny-level question about homing pigeons and their magnetoreception abilities could ask how these birds develop this navigation skill throughout their lives, focusing on any necessary neurological adaptations and whether the ability is refined by environmental experience or innate.
Step-by-step explanation:
Homing pigeons have the remarkable ability to navigate using the Earth's magnetic field, demonstrating magnetoreception. An ontogeny-level causal question about this behavior might be: 'How do individual homing pigeons develop their ability to detect and navigate using Earth's magnetic field over the course of their lives?'
At this level of analysis, we're interested in the developmental processes that enable pigeons to sense and utilize the Earth's magnetic field for navigation. For instance, do they have certain neurological adaptations that must be fine-tuned as they mature? Researchers might explore whether this sense develops as young birds are exposed to environmental navigation challenges, or if they possess an innate capability that's honed with experience.