rabbit's and more rabbit's .that is all they are regularly good for.
its not :/ typical goshawk noob they do well on pheso's, duck, moorhens,coots etc. will usually take quarry to the size of brown hare but i have known them to take geese, greater black back gulls and one gutsy female took a heron. the bird was ok but a heron WILL kill your bird so do not fly at them. what experience do you have? surely even if your new to this, you should know each bird has a different weight that you have to find and you should also no what quarry is legal. are you using telemetry? do you have a mentor