Most members of the family are easy to recognise: they have a relatively narrow neck, sturdy build and formidable curved proboscis. Large specimens should be handled with care, if at all, because they may defend themselves with a very painful stab from the proboscis.
References
↑There are some blood-sucking ectoparasites in the subfamily Triatominae.
↑Weaving, Alan; Picker, Mike; Griffiths, Charles Llewellyn (2003). Field Guide to Insects of South Africa. New Holland Publishers, Ltd. ISBN1-86872-713-0.