Final answer:
The mass of the eagle cannot be calculated with the information provided since we lack the mass of the pigeon or momentum exchange data.
Step-by-step explanation:
The mass of the eagle is not something that can be directly calculated from the velocity data provided because we don't have the mass of the pigeon or any momentum exchange information from an impact or grabbing event. The situation described seems to involve principles of physics, specifically mechanics and relative motion, but the problem as presented lacks sufficient data for calculation. To find the mass of the eagle accurately, the problem should provide either the mass of the pigeon or details about the momentum of the system before and after the eagle grabs the pigeon.