Celebrations have taken place to mark the 100th anniversary of the society which owns Edinburgh Zoo and the Highland Wildlife Park.
The Royal Zoological Society of Scotland was set up by Edinburgh lawyer Thomas Gillespie in 1909.
It took four years for him to achieve his aim of opening a zoo in Scotland.
The Edinburgh attraction still retains many of the original enclosures designed by town planner Patrick Geddes.
Former Reporting Scotland presenter Mary Marquis feeds the penguins
A gannet was the first exhibit, but the zoo went on to be best known for its penguins.
The three king penguins which arrived in 1914 were the first to be seen outside their homeland, and the hatching of the zoo's first penguin chick in 1919 led to international notoriety.
The daily penguin parade dates back to 1951, when a zoo keeper accidentally left a gate open and the penguins had to be guided back into their enclosure after a stroll round the zoo.
Follow source link for video:
(wiinterrr's note: this is a demonstration on how NOT to feed a penguin!)