Hi all..

@ K:
(how high can turtles jump?)

Well the most common pet bog turtle here is the red-eared
slider. Had them many years..

These guys are able to do both: climbing and digging..

http://plants.ifas.ufl.edu/guide/turtles.html

Wow.., what a great variety of turtles in Florida..! :-)

Several of these species look similar to sliders..

@ Galen:
I'm thinking of a low fence, one I can step over with
ease, how high can turtles climb?

Sounds good but I'd recommend to dig the fence 10cm deep
(~4")..

What eats turtles besides alligators?

Hmm.., dogs, big cats, raccoons, birds of prey might catch
and eat respectively injure them while playing around with
them..

They are wild animals and will always stay wild means
they're always attentive. They're able to see very well and
if there's any movement or disturbance they'll flee into
water..

An artificial island made of wood or cork and something like
a brigde (hope bridge is the right word) to climb out of
water were fine. An island with a observations deck 20-30cm
(8-12") above water surface were ideal, too..

Different to sunbathing human beeings they're alway used to
monitor the area around them..

I'll bet I have some really fast turtles then. :^)

Have fun.. :-)

--
cu
Marco