Tennessee Warbler (Leiothlypis peregrina)

OTHER NAMES: N/A
Latin Etymology: Leiothlypis ("plain unknown warbler") peregrina ("wanderer")

Tennessee Warbler (Leiothlypis peregrina) at Tarcoles, Costa Rica - November 2025

Featured Subspecies: N/A
Weight: 10g  /  Length: 11cm  /  Wingspan: 19cm
NO UK STATUS / IUCN Red List: Least Concern

Despite the name, the Tennessee Warbler does not actually breed anywhere near Tennessee, but rather has a range that makes it a near endemic breeder in Canada, only barely tipping over the US border at a few points. It is named as such as this is where a specimen on migration was collected. However, it is a long distance migrant to the Caribbean, Central America and the Northernmost countries of South America, where, while it's there, is a very common and adaptable species found in a wide range of habitats and altitudes. 
 
Related Species: 
Order: Passeriformes
Family: Parulidae
Genus: Leiothlypis
SUBSPECIES: none - monotypic 
 
- Sighting Locations - 

COSTA RICA - Spanish (Costa Rica) - Reinita Verdilla

A common and widespread Winter migrant
- COSTA RICA 2025 TRIP: Seen at Tarcoles, San Jose and San Gerardo de Dota. 

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto

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Orange-crowned Warbler (Leiothlypis celata)

OTHER NAMES: N/A
Latin Etymology: Leiothlypis ("plain unknown warbler") celata ("secret")

Immature Orange-crowned Warbler (Leiothlypis celata) at Anchorage, Alaska - August 2024

Featured Subspecies: Unclear
Weight: 9g  /  Length: 12-13cm  /  Wingspan: 18cm
NO UK STATUS / IUCN Red List: Least Concern

Despite the rather opulant sounding name, the namesake orange crown of this warbler is actually fairly difficult to see as it is usually hidden beneath the crest - in many ways this species is actually more closely resembling a drab old-world  phylloscopid warbler than the other parulid warblers we saw on the trip.

Related Species:
Order: Passeriformes
Family: Parulidae
Genus: Leiothlypis
SUBSPECIES: L. c. celata, L. c. lutescens, L. orestera, L. c. sordida

 - Sighting Locations -

CANADA -Present largely everywhere but the High Tundra and Great Plains
  - CHICAGO TO ALASKA ROADTRIP 2024: - Seen in Alberta, British Columbia and Yukon

UNITED STATES 
Breeds in the West including Alaska, Winters in South, Resident in thin strip along Pacific Coast
 - CALIFORNIA 2022 TRIP: Seen at  San Francisco 

 - CHICAGO TO ALASKA ROADTRIP 2024: Seen in Alaska

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto

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