Here you go matticus Hobby length 28cm-36cm Wingspan 70cm-92cm, Kestrel length 32cm-35cm Wingspan 71cm- 80cm
Sparrow hawk length 28cm-38cm Wingspan 55cm- 70cm, Peregrine 39cm-50cm Wingspan 95cm- 115cm
Peregrine is largest. Dont reckon size is very useful for ID though as you would need a comparison in the field. I go by silhouette and wing shape, also habitat and what the bird is doing ie hunting style.
I would be surprised if there werent Sparrow hawks where you live and Peregrines can be found in citys these days. Hobbys are rarer and summer visitors.
Thanks. So they are pretty similar if seen from any distance, especially if not standing to attention in a line :P
To be fair, you're right about Sparrow Hawks - a friend pointed one out on a ride a few months ago. But I would have really struggled to spot it on my own; it just flew across the road, could have been a crow, or any dark medium-sized bird!
But when these things are hovering, or sitting in the road tearing at some dead thing, or just coasting on the thermals; I do okay at identifying them (well, Kites, Kestrels and Buzzards anyway. And Owls ... )
I saw a Barn Owl in my bike light last night - first one on the evening commute for at least a year. Do Wols count?