I've pasted it tho the map wont paste over but its the text for now
SO WHAT DOES CONGO MEAN?
Now where do all these subspecies of “Congo” Greys fit into the scheme of things? Simply put, they don’t! They are simply variations of the same subspecies based on the areas in which they live.
If you refer to the regional map, drawn based on an exhibit from Parrots of the World by Joseph Forshaw, the lighter area is the range of the African Grey ((P.e.erithacus). It is one continuous range with no physical breaks or barriers. Further, the expanding circles indicate the following: The smallest darkest African Greys, about 300 grams and almost as dark as the Timneh Grey, can be found in the countries nearest the center. As the circles radiate out through the region of African Greys, the Greys get larger. Greys found in countries on the outer fringes of the circles will have the largest Greys, well over 600 grams. I have spoken with people that live east of lake Victoria who claim Greys from the islands in the Lake are in the 700 gram range.
(To see larger map click here)
As the circle radiates east through the range, the African Greys also get lighter in color, and as the circle radiates south from the center, the color remains the same, a darker gray. Logically, African Greys in the middle circles east of center will be medium in size and color while African Greys on the same circular ring southerly will be the same in size but as dark as the Greys north of them.
When people refer to Ghana, Togo, Cameroon, Congo and Angola Greys, they are referring to the region or country from which these parrots originated. These are their “street names” and they refer to “variations,” not subspecies.