Pallas's Warbler
Phylloscopus proregulus (Pallas, 1811)
PA
PALWA
12980
Family: Passeriformes > Phylloscopidae
Still a magical sight for anyone who finds one (they are commonest on the east coast in October/November), these tiny birds will have travelled more than 3,000 miles from breeding grounds in the Far East.
Select a topic for more facts and statistics about the Pallas's Warbler
BTO RECORDS
Identification
Pallas's Warbler identification is sometimes difficult.
Develop your bird ID skills with our training courses
Our interactive online courses are a great way to develop your bird identification skills, whether you're new to the hobby or a competent birder looking to hone your abilities.
Browse training coursesStatus and Trends
Population size and trends and patterns of distribution based on BTO surveys and atlases with data collected by BTO volunteers.
CONSERVATION STATUS
This species can be found on the following statutory and conservation listings and schedules.
| IUCN Red List of Threatened Species (global) |
Least Concern 
|
| Schedule 1 license required (to disturb) | No |
| Birds Directive Annex 1 | No |
|
Listed on the Annexes of
|
Bern(III), Bonn(II) |
POPULATION SIZE
We have no population estimates for this scarce species.
| BOU Category | A |
|
First Record
|
Norfolk, 1896 |
DISTRIBUTION
Pallas’s Warblers are rare late-autumn visitors from Siberia. During 2007–11 they were recorded from 58 10-km squares in winter, with 52 of these involving sightings in November only. The bulk of the records were from the North Sea coast between Aberdeenshire and north Norfolk. In contrast, several of the records in English south-coast counties were made in midwinter.
-
Britain and Ireland Breeding Distribution 2008-2011.
More from the Atlas Mapstore. -
Britain and Ireland Winter Distribution 2008-2011.
More from the Atlas Mapstore.
Occupied 10-km squares in UK
| No. occupied in winter | 58 |
| % occupied in winter | 1.9 |
DISTRIBUTION CHANGE
More from the Atlas Mapstore.
| % change in range in winter (1981–84 to 2007–11) | +450% |
SEASONALITY
Pallas's Warbler is a scarce autumn passage migrant with most birds arriving in October and November; some birds have wintered and there are occasional spring records.
Movement
Information about movement and migration based on online bird portals (e.g. BirdTrack), Ringing schemes and tracking studies.
RINGING RECOVERIES
View a summary of recoveries in the Online Ringing Report.
Foreign locations of birds ringed or recovered in Britain & Ireland
Biology
Lifecycle and body size information about Pallas's Warbler, including statistics on nesting, eggs and lifespan based on BTO ringing and nest recording data.
PRODUCTIVITY & NESTING
|
Number of Broods
|
1? |
|
Egg Size
|
14×11 mm Weight = 0.9 g (of which 5% is shell) |
BIOMETRICS
| Juveniles | 51.2±2.4 | Range 47.5-55mm, N=50 |
| Juveniles | 5.40±0.6 | Range 4.60–6.20g, N=41 |
Feather measurements and photos on featherbase
CODES & CLASSIFICATION
|
Ring size
|
AA |
|
Field Codes
|
2-letter: PA | 5-letter code: PALWA | Euring: 12980 |
For information in another language (where available) click on a linked name
Links to more studies from ConservationEvidence.com
- Breeding bird populations of Kentish sweet chestnut (Castanea sativa) coppice in relation to age and structure of the coppice
- Population trends of breeding birds in the ecologically upgraded Rhine valley (canton of St. Gallen, Switzerland)
- An experimental study of the availability of feathers for avian nest building
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