One of the most deadly plant toxins, abrin, is produced by rosary pea (Abrus precatorius). As little as of toxin per body weight will cause fatality in humans (a single seed). Birds appear to be unaffected by the deadly toxin.
The Horse-shoe Ophrys: Ophrys ferrum-equinum. A miniature to medium-sized cold-growing terrestrial orchid that is found in the Aegean, Crete, Greece and western Turkey in short grasslands, scrub and open woodlands at elevations up to 1100 meters.