Here is the next update:
I have now more or less finished Sulawesi and Sumatra, along with Monsoon Forest. Challenges this time around were drawing the animals in a way that they could be recognised - this was a particular problem with the Sun bear, since its body shape doesn't necessarily correspond with most people's image of a bear
. However the drawing that caused me the most problems was ironically the tiger, even though I have drawn the species over 80 times in the past few years... 
I found out to my amazement that I have now drawn over 600 trees on this map and counting...
Hopefully the animals all look recognisable enough and there are no problems with accuracy. Next update I will probably have completed Islands, and then I guess I will move on to the African grasslands area.
I have now more or less finished Sulawesi and Sumatra, along with Monsoon Forest. Challenges this time around were drawing the animals in a way that they could be recognised - this was a particular problem with the Sun bear, since its body shape doesn't necessarily correspond with most people's image of a bear
I found out to my amazement that I have now drawn over 600 trees on this map and counting...
Cheseter Zoo Map - Islands so far
The entirety of Islands so far - I have finished Sumatra apart from a couple of small viewing...
Chester Zoo Map - Full progress on Islands
The entirety of my work since the last update, focusing on the island of Sumatra within Islands...
Chester Zoo Map - Sun Bear and Javan Green Magpie detail
A detail from a map I am making of Chester Zoo.
Hopefully the animals all look recognisable enough and there are no problems with accuracy. Next update I will probably have completed Islands, and then I guess I will move on to the African grasslands area.