The cetacean washed up on the shores of Harris - an island part of the Outer Hebrides famed for its white sand beaches.
Mitzi the dog was reunited with her owner after a two-hour rescue operation.
The huge rescue operation to save dozens of animals was funded by The Aspinall Foundation.
Koala Hospital Port Macquarie made the decision to put Lewis to sleep as his burns took a turn for the worse and would not recover.
Rescuer Toni Doherty said it was her ‘natural instinct’ to pull the animal from the burning trees.
The aquatic mammals will be released into large enclosures at two places managed by the conservation charity.
When Bear smells a koala, he sits very still to alert his handler that an animal is nearby.
The 10-week-old dog was rescued and given the name Narwhal.
The silver-backed chevrotain was last documented alive three decades ago.
Rains which should have fallen in October did not emerge, leaving land parch and farmers struggling to reap their harvests.