Phylloscopus borealis
Taxonomy [top]
| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| ANIMALIA | CHORDATA | AVES | PASSERIFORMES | SYLVIIDAE |
| Scientific Name: | Phylloscopus borealis | |||
| Species Authority: | (Blasius, 1858) | |||
Common Name/s:
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Assessment Information [top]
| Red List Category & Criteria: | Least Concern ver 3.1 | ||||||
| Year Published: | 2009 | ||||||
| Assessor/s: | BirdLife International | ||||||
| Reviewer/s: | Bird, J., Butchart, S. | ||||||
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Justification: This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. |
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| History: |
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Geographic Range [top]
| Countries: |
Native:
Brunei Darussalam; Cambodia; Canada; China; Finland; Hong Kong; India; Indonesia; Japan; Korea, Democratic People's Republic of; Korea, Republic of; Lao People's Democratic Republic; Malaysia; Mexico; Mongolia; Myanmar; Norway; Philippines; Russian Federation; Russian Federation; Russian Federation; Singapore; Sweden; Taiwan, Province of China; Tajikistan; Thailand; Timor-Leste; United States; Viet Nam
Vagrant:
Australia; Bulgaria; Denmark; Faroe Islands; France; Germany; Gibraltar; Greece; Ireland; Italy; Kazakhstan; Luxembourg; Malta; Netherlands; Oman; Poland; Saudi Arabia; Spain; United Kingdom
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| Range Map: | Click here to open the map viewer and explore range. |
Population [top]
| Population: | Rich et al. (2004) estimated the global population to number 30,000,000 individuals. In Europe, the breeding population is estimated to number 4500000-8000000 breeding pairs, equating to 13500000-24000000 individuals (BirdLife International 2004). Europe forms 5-24% of the global range, so a very preliminary estimate of the global population size is 56300000-480000000 individuals, although further validation of this estimate is needed. |
Habitat and Ecology [top]
| Systems: | Terrestrial; Freshwater |
| Citation: | BirdLife International 2009. Phylloscopus borealis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 22 May 2012. |
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