Well, they give you the initial conditions, which are the speed and angle of the trajectory.
With this, you should be able to calculate the maximum height (using the y component of the trajectory speed). Once it hits the bird, it falls straight down (in other words, the x component of velocity goes to 0 upon impact).
Beyond that, I don't really find it necessary to tell you how to solve the question, as I'm sure there are many ways.
HINT: If the impact occurs at the top of the trajectory, the y-component of the velocity is 0 at that time.