Southern Brown-throated Weaver, Range-change map between SABAP1 (1987-1991) and SABAP2 (2007-current).
Red, orange and yellow = cells with very large, large, and small relative decreases
Blue, dark green and light green = cells with very large, large and small relative increases.
Cells = quarter-degree grid cells; Only cells with at least 4 checklists in both SABAP1&2 shown. All cells had this species recorded in SABAP1 or in SABAP2 or in both (more about interpretation at Biodiversity Observations 7.62: 1-13).
Southern Brown-throated Weaver, figure from Birdpix
Range changes in SA
Range change summary
More
4 lists
30 lists
decreases
n
%
n
%
Decrease
20
50
15
45
Tiny change
5
13
4
12
Increase
15
38
14
42
Total
40
100
33
100
In South Africa the Southern Brown-throated Weaver has many more grid cells with decreases in reporting rate than cells showing increases, between SABAP1 (1987-1991) and SABAP2 (2007-).
The points below match the points on the map above.
Areas with very large increases include:
1. SE Mpumalanga, especially around Komatipoort - this species was not recorded in Mpumalanga prior to 2002.
Areas with very large decreases:
2. Northern coastal Zululand in KwaZulu-Natal.
3. Coastal KwaZulu-Natal has many grids with decreases although a few have large increases.
4. Southernmost limit - the furthest south record for this species is from Illovo, south of Durban (Oatley 1973a), but has rarely been recorded south of Durban since.
Range changes elsewhere
Zimbabwe: range extension to Mashumbi Pools along Zambesi River (Masterson 1987a).
