The Tower of London say the killing of two of its ravens by foxes was the first time they have been attacked in a number of years, with most of its ravens living long and healthy lives.
In recent years there have been no fatalities due to foxes, a natural raven predator, and the ravens are put to bed each evening in secure enclosures to minimise these risks. However, sadly, in May 2013 a fox captured two of the ravens before they were put to bed.
We take the welfare of the ravens seriously and have been reviewing our current pest control measures.
– Tower of London spokesperson
They say ravens at the Tower usually live longer than those in the wild - with the oldest one on record reaching 44 years.
Improvements for the ravens' facilities at the Tower are being put in place throughout the Autumn, including a redesign of their nighttime enclosure.
The Tower of London is beefing up its pest control measures after two of its resident ravens were killed by foxes - putting the future of the Royal Family in jeopardy according to legend.
The birds are known as "Guardians of the Tower" following superstition that there should always be six of them or the monarchy, the kingdom and the Tower itself will fall. King Charles II took the myth so seriously that he made the need for six ravens into a royal decree, which still stands today.
However, it's emerged that two of the ravens were attacked and killed by foxes earlier this year - but luckily the Tower keep eight of them just to be extra safe.
The ravens, named Jubilee and Grip, were snatched just before they were due to be locked in their cages overnight.
Tower of London staff say they are now looking into their measures to protect the ravens, and have since replaced them with two others of the same name.