<sod >Boa constrictors, anacondas and some other pythons are thought to cut off the blood supply of prey A Cumbria police spokesperson said: âThe animal does not pose an immediate risk to the public, however if sighted advice is not to approach it and to contact police immediately.< eod>< sod > Boa constrictors, anacondas and some other pythons are thought to cut off the blood supply of prey A Cumbria police spokesperson said: "The animal does not pose an immediate risk to the public, however if sighted advice is not to approach it and to contact police immediately."Â  It is not the first time a boa constrictor has escaped its owner in the UK.< eod>