Did you know that birds have much better colour vision than do humans? They can see parts of the UV spectrum & also distinguish subtle shade graduations, invisible to us. They have 4 types of cones for colour detection in their retina whereas we only have 3. Maybe that is why we have given birds so many names using a comparatively few number of colours.
This is a 2-stage cache. Solve the puzzle to get co-ordinates for the first stage, then see like a bird to find the final. (There is no log sheet in Stage 1)
First stage is at N56 ab.(c-1)de W003 fg.hij
For each letter a-j you must choose a colour from this list, which will give you the digit you need.
0 black
1 white
2 grey
3 yellow
4 gold
5 red
6 blue
7 purple
8 green
9 golden
The correct colour can be used as a prefix for all the words/phrases in a particular letter's list to make the name of a real bird.
a) grouse, -throated diver, -winged stilt
b) eye, plover, pheasant
c) stork, throat, wagtail
d) -tailed godwit, -necked grebe, kite
e) shank, kite, -necked grebe
f) grouse, -throated diver, -crested pochard
g) wagtail, plover, heron
h) finch, shank, sandpiper
i) sandpiper, heron, swamphen
j) wagtail, legs, hammer
Remember to take the necessary to see like a bird to get co-ordinates for the final.
You can check your answers for Stage 1 of this puzzle on GeoChecker.com.