Booted Warbler

Iduna caligata

Introduction

This undistinguished medium-sized warbler normally winters in India, but is a rare annual visitor from Russia.

Scottish and east coast records tend to fall in the autumn (August to September), while south coast birds show a wider spread across the year.

Key Stats

Status

Very rare

Weight

9.5g

Seasonality

<1%

BTO Records

753 records

Population and distribution stats for:

No data

No current data

No current data

No data

No current data

No current data

Status and Trends

Population size, trends and patterns of distribution based on BTO and partnership surveys and atlasses with data collected by BTO volunteers.

Conservation Status

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This species can be found on the following statutory and conservation listings and schedules.

Species of European Conservation Concern

Least Concern

IUCN Red List of Threatened Species (global)

Least Concern

Schedule 1 Licence required (to disturb)*

Birds Directive Annex 1

* A guide only. Check details with the original legislation, especially those marked with an asterisk. See About Birdfacts for more information.

Population Size

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BOU Category

Source

First Record*

Fair Isle, 1936

* First documented occurrence. Most species undoubtedly occurred before this. See About Birdfacts for more information.

Population Change

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Population trends of this scarce species are not routinely monitored.

Distribution

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This vagrant is too rarely reported to map distribution.

European Distribution Map

European Breeding Bird Atlas 2

Distribution Change

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This vagrant is too rarely reported to map distribution change.

Seasonality

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Booted Warbler is a rare vagrant typically recorded in September and October.

Weekly pattern of occurrence

The graph shows when the species is present in the UK, with taller bars indicating a higher likelihood of encountering the species in appropriate regions and habitats.

Phenology graph — Weekly occurrence patterns (shaded cells and reporting rates (vertical bars) based on BirdTrack data. Reporting rates give the likelihood of encountering the species each week.

Movement

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

Britain & Ireland movement

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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

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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.

Biology

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

Survival and Longevity

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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.

Classification, names and codes

Taxonomy, names and species codes for Booted Warbler

Classification and Codes

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Order: Passeriformes
Family: Acrocephalidae
Scientific name: Iduna caligata
Authority: MHK Lichtenstein, 1823

BTO 2-letter code: DM
BTO 5-letter code: BOOWA
Euring code number: 12561

Alternate species names

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Catalan: busqueta asiàtica
Czech: sedmihlásek malý
Danish: Lille Gulbug
Dutch: Kleine Spotvogel
Estonian: väike-käosulane
Finnish: pikkukultarinta
French: Hypolaïs bottée

German: Buschspötter
Hungarian: kis geze
Icelandic: Glapsöngvari
Italian: Canapino asiatico
Latvian: klusais kaukis
Lithuanian: mažoji tošinuke
Norwegian: Tartarsanger

Polish: zaganiacz maly
Portuguese: felosa-calçada
Slovak: sedmohlások malý
Slovenian: mali vrtnik
Spanish: Zarcero escita
Swedish: stäppsångare
Welsh: Telor Bacsiog

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.

BTO

Esmée Fairbairn Foundation

JNCC

RSPB

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