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Bertram's Weaver Ploceus bertrandiIUCN: Least concern Discovery: 093
IntroductionBertram's Weaver was formally described by George Ernest Shelley, an English geologist and ornithologist.
Bertram's Weaver was collected by Alexander Whyte, a Scottish botanist.
Commissioner HH Johnston hired Alexander Whyte to collect fauna and flora specimens in British Central Africa. Bertram Lutley Sclater, the son of the ornithologist Dr. P. L. Sclater, and Commander of the Police Force of British Central Africa 1891-93, accompanied the expedition as security.
Whyte collected birds in 3 localities in southern Malawi in 1891. On 29 May they ascended Mt Zomba, then collected specimens here during Aug-Sep, including two Bertram's Weaver specimens. On 20 Oct the expedition visited Mt Milanji spending 2 weeks on the plateau, collecting one Bertram's Weaver specimen.
Whyte also collected several female Bertram's Weaver specimens in southern Malawi during 1892. These were also investigated by Shelley (in 1894) who described them as males of a separate species. A few decades later, Neunzig 1924a realised that these were the female of Bertram's Weaver, based on a large sample of specimens of both taxa in the Berlin Museum.
Shelley named Bertram's Weaver after Bertram Lutley Sclater, but the scientific name was given as bertrandi rather than as bertrami.
The first illustration of Bertram's Weaver was of a male and juvenile, published by Shelley (1893) in his initial description of the species. The next illustration was of the female of this species in Shelley (1905), initially thought to be the male of a different species.
Scientific citationHyphantornis bertrandi Shelley 1893a, Ibis, p.23, pl. 2, Plains near Milanji, southern Nyasaland [Zomba].
Meaning of namesbertrandi, Named after Captain Bertrand L. Sclater (1866-1897).
First English nameNyasa Black-beaded Weaver (Shelley 1905b).
Alternate namesBertrand's Weaver, Bertrand's Masked-Weaver, Nyasa Black-beaded Weaver.
Date collectedAug, Sep, Oct 1891.
Locality collectedMilanji (Mount Mulanje) and Zomba, Malawi.
Type specimensThree syntypes are in the British Museum (eg BM 18188.8.131.52).
The above is based on Weaver Wednesday 2, a weekly series about the discovery of each weaver species.
This species text first appeared as Weaver Wednesday  - Discovery : Bertram's Weaver on 2016-06-22
1. Basic biology
The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday : Bertram's Weaver on 2013-12-25
2. Breeding facts
Apr in Tanzania, Nov-Dec in Zambia and Aug-Apr (also record of fledged young fed by adults in May) in Malawi
usually placed at tip of branch of thorny acacia (Acacia) or in evergreen tree, often near a stream
deep green, heavily marked with red-brown spots and blotches
size 22.5 x 16 mm (Malawi)
Chicks and nestling period
young fed by both sexes
Breeding information based on Handbook of the Birds of the World, Vol. 15.
3. Photos of Weaver NestsNo records yet - be the first to submit a PHOWN record!
See PHOWN summary page for this species here.
4. Breeding distribution
Google map showing distribution (For species with small ranges you need to zoom in at the correct area to see the range):
yellow blob - range of weaver species; read more about this here.
- PHOWN records with photos
- PHOWN records with no photos (Nest Record Cards, other records)
- Birdpix records
- comments on out of range records, or interesting records
- type locality
CLICK on the marker on the map to see individual record details.
5. Range changesStill coming
The above is based on Weaver Wednesday 3, a weekly series about range changes in South African weaver species.
This species text first appeared as Still coming