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Weaver Wednesday 3 [253] - Range changes [16]: Red-billed Quelea

2017-04-19 (777)

gravit8 Weaver Wednesday 3: range changes in S Africa (species text)

Red-billed Quelea Quelea quelea

Red-billed Quelea, 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).

Red-billed Quelea
Red-billed Quelea,
figure from Birdpix

Range changes in SA

Range change summary
More 4 lists 30 lists
increases n % n %
Decrease 200 15 51 9
Tiny change 221 16 102 20
Increase 929 69 372 71
Total 1350 100 525 100
In South Africa the Red-billed Quelea 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. Free State to southern KwaZulu-Natal.
2. Western part of the Eastern Cape.
3. Most of the Western Cape - this is a range expansion in recent decades.

Mixed results (increases and decreases):
4. Limpopo Province
5. North-West Province and the Northern Cape - mixed results due to poor coverage - more atlasing needed!

6. Lesotho - occurs at low density; SABAP2 coverage too low for meaningful results.

Range changes elsewhere

Exotic populations established in foreign countries, eg Spain, Oman, Reunion: Appendix of Dyer EE, Redding DW, Blackburn TM. 2017. The global avian invasions atlas, a database of alien bird distributions worldwide. Nature Scientific Data 4 no: 170041.

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 [253] - Range changes [16]: Red-billed Quelea (2017-04-19)
Quelea ringing at Vyevlei, 4-6 March 2016 (2016-03-08)
PAPER (breeding): Red-billed Quelea breeding record (2015-09-15)
Ringing Red-billed Quelea in the Worcester area, 6 Sept 2015 (2015-09-10)
Quelea ringing at Vyevlei, 20-22 Feb 2015 (2015-02-27)
Africa's bird pest (2014-11-24)
Weaver Wednesday [122] - Discovery [5]: Red-billed Quelea (2014-10-15)
PAPER: Using quelea as food (2014-07-07)
Quelea near Malmesbury, 18-19 Jan 2014 (2014-01-21)
PAPER: Quelea, a pest on sorghum (2013-12-02)
PAPER: Quelea cestodes (2013-11-11)
THESIS: Attitudes toward Red-billed Queleas (2013-08-05)
PAPER: Ultrasonic bird repeller (2013-03-04)
PAPER: Quelea predator (2012-10-15)
Weaver Wednesday [11]: Red-billed Quelea (2012-08-29)
PAPER: Red-billed Quelea plumages (2012-08-06)
Red-billed Quelea sets the alarm bells ringing in the "Southern Cape" (2012-04-23)
PAPER: Estimating Bird Damage to Rice (2012-04-15)
Red-billed Quelea longevity (2012-01-09)
Red-billed Quelea midday roosts (2011-12-26)
View quelea range expansion in W Cape (2011-08-08)
Africa's feather locust is both an adder and a mulitplier (2011-06-24)
PAPER: Eagle predation on quelea colony (2011-02-23)
PAPER: Unique Quelea predator (2010-09-15)
PAPER: Wintering ecology - Lesser Spotted Eagles and Red-billed Quelea (2010-06-12)
Red-billed Quelea sighting (2010-05-25)
PAPER: Quelea lice (2010-04-07)
PAPER: Red-billed Quelea irruption (2009-12-13)
Red-billed Quelea flies 1735 km just to be eaten! (2009-12-04)
Birds and Environmental Change (2009-11-12)
Cape Argus reports on Red-billed Quelea in the Western Cape (2009-04-30)
First breeding record of the Red-billed Quelea near Worcester (2009-04-22)
Quelea recovery (2009-04-09)