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Weaver Wednesday 3 [250] - Range changes [13]: Southern Brown-throated Weaver

2017-03-29 (774)

Weaver Wednesday 3: range changes in S Africa (species text)

Southern Brown-throated Weaver Ploceus xanthopterus

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).

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).

All news items relating to this species

The headers below refer to Weaver News items featuring this species. Click on a header to see the News item, which includes the full news item. (The number in brackets is the date that the news item appeared on Weaver Watch).

Weaver Wednesday 3 [250] - Range changes [13]: Southern Brown-throated Weaver (2017-03-29)
Weaver Wednesday [186] - Discovery [69]: Southern Brown-throated Weaver (2016-01-06)
PAPER: New rove beetle from weaver nest (2013-12-30)
Weaver Wednesday [38]: Southern Brown-throated Weaver (2013-03-06)