I think the goal with this method could be to train the hawk to carry an object such as a net or dangling string that the hawk would drop into the propellers of the drone, thus disabling it.
One could also use a hawk as a platform to carry electronic means of disabling drones.
The problem with hawks and drones becomes one of teaching the hawk to recognize enemy drones since it is likely in future wars that all sides will use drones and that it may be difficult to identify who controls a particular drone without monitoring that drone to map its communication path.
It's cool to use a bird that instinctively hunts other birds but we need to understand that hawks are not hard to see and to eliminate so their utility on a battlefield is limited.
One could also use a hawk as a platform to carry electronic means of disabling drones.
The problem with hawks and drones becomes one of teaching the hawk to recognize enemy drones since it is likely in future wars that all sides will use drones and that it may be difficult to identify who controls a particular drone without monitoring that drone to map its communication path.
It's cool to use a bird that instinctively hunts other birds but we need to understand that hawks are not hard to see and to eliminate so their utility on a battlefield is limited.