Weaver Wednesday 3: range changes in S Africa
(species text)
Village Weaver Ploceus cucullatus
Village 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).
Village Weaver, figure from Birdpix
Range changes in SA
Range change summary
More
4 lists
30 lists
increases
n
%
n
%
Decrease
146
23
72
20
Tiny change
120
20
74
21
Increase
355
57
211
59
Total
621
100
357
100
In South Africa the Village Weaver has many more grid cells with increases in reporting rate than cells showing decreases, between SABAP1 (1987-1991) and SABAP2 (2007-).
The points below match the points on the map above.
Areas with very large increases include:
1. Western limit in the Eastern Cape.
2. Western limit of KwaZulu-Natal (including the Drakensberg) to SW Mpumalanga.
3. Northern North-west Province.
Areas with very large decreases:
4. Kruger National Park (also northern parts of Limpopo Province).
Range changes elsewhere
Sudan: now breeding resident around Khartoum; some records along Nile further north (Demey 2014b).
