No, there are no natural phenomena, including bumblebee flight, that defy physics. While there may be instances where certain phenomena appear counterintuitive or difficult to explain, they can always be understood within the framework of the laws of physics.
Bumblebee flight, for example, was once thought to defy physics because early aerodynamic models based on steady airflow and simplified wing shapes failed to explain how bumblebees, with their relatively large bodies and small wings, could generate enough lift to fly. However, further research and more detailed studies have shown that bumblebees utilize unsteady airflow and complex wing motions, such as rapid wing flapping and wing-wake interactions, to generate the necessary lift and thrust for flight. These mechanisms are consistent with the principles of fluid dynamics and aerodynamics, even though they may differ from the flight strategies of larger insects or birds.
In general, when scientists encounter seemingly mysterious or unexplained phenomena, it often indicates a gap in our understanding or a need for more accurate models. Scientific inquiry aims to uncover the underlying physical principles and mechanisms governing natural phenomena, and over time, these phenomena are usually explained and incorporated into our understanding of the laws of physics.
It's worth noting that there are still many unanswered questions and ongoing research in various fields of science, including physics, and new discoveries continue to expand our knowledge and refine our understanding of the natural world. However, these discoveries do not violate the fundamental principles of physics but rather enrich our understanding of how the universe operates.