Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

The moult of Barred Warblers Sylvia nisoria in Kenya—evidence for a split wing‐moult pattern initiated during the birds' first winter

LINDSTRÖM, ÅKE LU orcid ; PEARSON, DAVID J. ; HASSELQUIST, DENNIS LU ; HEDENSTRÖM, ANDERS LU ; BENSCH, STAFFAN LU orcid and ÅKESSON, SUSANNE LU orcid (1993) In Ibis 135(4). p.403-409
Abstract

The moult of Barred Warblers Sylvia nisoria was studied during three winter seasons in southeastern Kenya at a southward passage site (Ngulia) and a wintering site (Mtito Andei). Most Barred Warblers migrating through Ngulia in November had yet to commence winter moult. These birds probably moulted subsequently in winter in northern Tanzania. In December, birds were found in heavy moult at Mtito Andei, and some of these birds were known to stay throughout the winter. By contrast, most birds reaching southeastern Kenya from late December onwards had already completed part or all of their winter moult, presumably at stopover sites in northern and eastern Kenya or in Ethiopia. Thus, winter moult in Barred Warblers takes place mainly in... (More)

The moult of Barred Warblers Sylvia nisoria was studied during three winter seasons in southeastern Kenya at a southward passage site (Ngulia) and a wintering site (Mtito Andei). Most Barred Warblers migrating through Ngulia in November had yet to commence winter moult. These birds probably moulted subsequently in winter in northern Tanzania. In December, birds were found in heavy moult at Mtito Andei, and some of these birds were known to stay throughout the winter. By contrast, most birds reaching southeastern Kenya from late December onwards had already completed part or all of their winter moult, presumably at stopover sites in northern and eastern Kenya or in Ethiopia. Thus, winter moult in Barred Warblers takes place mainly in late November and December, either just before or soon after the final leg of autumn migration. In general, first‐year birds renewed all tertials and tail feathers, about three to five secondaries per wing and commonly also the outer one to four large primaries per wing. Adults renewed all tertials and tail feathers, almost all secondaries and only occasionally an outer primary. The replacement of relatively fresh juvenile secondaries during the birds' first winter implies that the split moult pattern of this species (secondaries, tertials and tail moulted in winter; primaries and tertials in summer) is endogenously controlled.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ibis
volume
135
issue
4
pages
7 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:0027884002
ISSN
0019-1019
DOI
10.1111/j.1474-919X.1993.tb02112.x
language
English
LU publication?
yes
id
7a07f5bc-54fc-459c-a992-d6d98802f1e0
date added to LUP
2025-04-14 13:06:11
date last changed
2025-04-24 02:17:38
@article{7a07f5bc-54fc-459c-a992-d6d98802f1e0,
  abstract     = {{<p>The moult of Barred Warblers Sylvia nisoria was studied during three winter seasons in southeastern Kenya at a southward passage site (Ngulia) and a wintering site (Mtito Andei). Most Barred Warblers migrating through Ngulia in November had yet to commence winter moult. These birds probably moulted subsequently in winter in northern Tanzania. In December, birds were found in heavy moult at Mtito Andei, and some of these birds were known to stay throughout the winter. By contrast, most birds reaching southeastern Kenya from late December onwards had already completed part or all of their winter moult, presumably at stopover sites in northern and eastern Kenya or in Ethiopia. Thus, winter moult in Barred Warblers takes place mainly in late November and December, either just before or soon after the final leg of autumn migration. In general, first‐year birds renewed all tertials and tail feathers, about three to five secondaries per wing and commonly also the outer one to four large primaries per wing. Adults renewed all tertials and tail feathers, almost all secondaries and only occasionally an outer primary. The replacement of relatively fresh juvenile secondaries during the birds' first winter implies that the split moult pattern of this species (secondaries, tertials and tail moulted in winter; primaries and tertials in summer) is endogenously controlled.</p>}},
  author       = {{LINDSTRÖM, ÅKE and PEARSON, DAVID J. and HASSELQUIST, DENNIS and HEDENSTRÖM, ANDERS and BENSCH, STAFFAN and ÅKESSON, SUSANNE}},
  issn         = {{0019-1019}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{403--409}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Ibis}},
  title        = {{The moult of Barred Warblers Sylvia nisoria in Kenya—evidence for a split wing‐moult pattern initiated during the birds' first winter}},
  url          = {{http://dx.doi.org/10.1111/j.1474-919X.1993.tb02112.x}},
  doi          = {{10.1111/j.1474-919X.1993.tb02112.x}},
  volume       = {{135}},
  year         = {{1993}},
}