Video: Heron falls victim to captive lion's hunting instict at Amsterdam zoo The great blue heron could scarcely have picked a worse place to stop after setting down in the lion's den at the zoo in the Dutch capital. Impressively plucked from mid-air by the lioness as it attempted to escape the big cat's advances, amateur footage captured the moment when the lion's hunting instinct was stirred and the wading bird was chased down.