Hi Alex, as Nightshade suggests the earlyer the better, before they get enough energy from the sun to disperse, also try and keep the sun to your face as a big shadow looming up on adders can bother them, also tread lightly, they sense vibration in the ground but are unable to pick up airbourne noise.Aproach v slow,one small tipy toe at a time. ps if mr Hyde see's this thread i'm sure he'l have some wise advise, he's taken some impresive snaps.