✓ Fill the frame with the insect — get as close as your phone will focus.

✓ Shoot from above and from the side if it stays put; body shape and wing position both matter.

✓ Tap the screen on the insect to lock focus before you shoot.

✗ Motion blur — the single most common cause of a wrong call. Brace your hands or steady the phone on something.

✗ Shooting through glass, mesh or a jar.

✗ Squashed specimens; identification drops off sharply once shape is lost.