Weaver news

Weaver Wednesday 3 [246] - Range changes [9]: Village Weaver

2017-03-01 (769)

gravit8 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
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).