Brown-headed nuthatch / Braunkopfkleiber (Sitta pusilla)

Wikipedia: Brown-headed nuthatch Source: OTHER Brown-headed_Nuthatch-27527-4c.jpg
Classification: Genus Sitta; Family Sittidae
General: The brown-headed nuthatch (Sitta pusilla) is a small songbird found in pine forests throughout the Southeastern United States. Genetic analyses indicated low differentiation between northern and southern populations in Florida, but the study also found lower genetic diversity among south Florida populations that may be a result of the increased habitat fragmentation that was documented. A population on the Bahamas showed moderate to high differentiation compared with Florida populations.^[2] The Bahama nuthatch was and still is considered a subspecies (S. p. insularis) by several authorities including the IOC, but the IUCN and BirdLife International have reclassified it as its own separate species.^[3] Two recent studies assessing vocalizations in Bahama and continental nuthatch populations found important differences.^[4][5] One of the studies^[4] also demonstrated that continental and Bahama populations did not respond aggressively to calls of the other population. This type of call-response study is often used to help define cryptic species.^[6] [more]

🔍 No documented observation