Aquatic Warbler

Aquatic Warbler

Acrocephalus paludicola

Introduction

Similar to a Sedge Warbler in general appearance, but with a buff crown stripe and more patterned back, Aquatic Warbler is a rare passage visitor to Britain.

Aquatic Warbler has a restricted breeding range, with 80% of the global population thought to breed in Poland. Autumn movements to the wintering grounds in western Africa result in records of birds along the English Channel coasts. Numbers here fallen in recent years, most likely a result of declines in the breeding populations linked to habitat loss.

Key Stats

Eggs
Eggs
4-6
BTO Records
BTO Records
486 records
Population and distribution stats for:

Movement

Information about Aquatic Warbler movements and migration based on online bird portals (e.g. BirdTrack), Ringing schemes and tracking studies.

Britain & Ireland movement

View a summary of recoveries in the Online Ringing Report

Foreign locations of birds ringed or recovered in Britain & Ireland

Dots show the foreign destinations of birds ringed in Britain & Ireland, and the origins of birds ringed overseas that were subsequently recaptured, resighted or found dead in Britain & Ireland. Dot colours indicate the time of year that the species was present at the location.

  • Winter (Nov-Feb)
  • Spring (Mar-Apr)
  • Summer (May-Jul)
  • Autumn (Aug-Oct)
Foreign locations of birds ringed or recovered in Britain & Ireland

European movements

EuroBirdPortal uses birdwatcher's records, such as those logged in BirdTrack to map the flows of birds as they arrive and depart Europe. See maps for this species here.

The Eurasian-African Migration Atlas shows movements of individual birds ringed or recovered in Europe. See maps for this species here.

Biology

Lifecycle and body size information for Aquatic Warbler, including statistics on nesting, eggs and lifespan based on BTO ringing and nest recording data.

Productivity and Nesting

Nesting timing

Typical (exceptional) number of broods
1–2

Egg measurements

Typical length x width
17x13 mm
Mass (% shell)
1.5g (6%)

Clutch Size

Typical number
6-4 eggs
Observed minimum and maximum
3-8 eggs

Incubation

Incubation by
Male + Female
Typical duration
15-12 days

Fledging

Type of chick
Altricial, naked
Typical duration
14-13 days

Survival and Longevity

Survival is shown as the proportion of birds surviving from one year to the next and is derived from bird ringing data. It can also be used to estimate how long birds typically live.

View number ringed each year in the Online Ringing Report.

Biometrics

Wing length and body weights are from live birds (source).

Wing length

Average ±1 std deviation; range and sample size in brackets.
Juvenile
64.1±1.5 mm
(62-66 mm, N=57)

Body weight

Average ±1 std deviation; range and sample size in brackets.
Juvenile
64.1±1.5 mm
(62-66 mm, N=57)

Ring Size

A

Classification, names and codes

Taxonomy, names and species codes for Aquatic Warbler

Classification and Codes

  • Order: Passeriformes
  • Family: Acrocephalidae
  • Scientific name: Acrocephalus paludicola
  • Authority: Vieillot, 1817
  • BTO 2-letter code: AQ
  • BTO 5-letter code: AQUWA
  • Euring code number: 12420

Alternate species names

  • Catalan: boscarla d'aigua
  • Czech: rákosník ostricový
  • Danish: Vandsanger
  • Dutch: Waterrietzanger
  • Estonian: tarna-roolind
  • Finnish: sarakerttunen
  • French: Phragmite aquatique
  • German: Seggenrohrsänger
  • Hungarian: csíkosfeju nádiposzáta
  • Icelandic: Fenjasöngvari
  • Irish: Ceolaire Uisce
  • Italian: Pagliarolo
  • Latvian: grišlu kaukis
  • Lithuanian: meldine nendrinuke
  • Norwegian: Vannsanger
  • Polish: wodniczka
  • Portuguese: felosa-aquática
  • Slovak: trsteniarik vodný
  • Slovenian: povodna trstnica
  • Spanish: Carricerín cejudo
  • Swedish: vattensångare
  • Welsh: Telor Dwr

More Evidence

More evidence from Conservation Evidence.com

Partners

Birdfacts is based on data collected by volunteers participating in surveys that are organised and funded by BTO, RSPB, Esmée Fairbairn Foundation, JNCC and other partners.
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