The President, the third largest tree on earth. The President, Sequoia National Park is 3200 years old. "The President" is the second most massive tree ever measured: it's 27 feet wide at the bottom and 247 feet tall.
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.