A new genetic study of the endangered endemic Black‐fronted Tern (Anne-Kathrin V. Schlesselmann et al) has found a morphometric cline with individuals being larger in the south compared to the north of the South Island in three traits (head‐bill length, bill depth, weight), and contrasting patterns of population structure at large and fine geographical scales. The study includes a map showing the location of Black-fronted Tern colonies in the South Island.
Link to study: https://onlinelibrary.wiley.com/doi/ful ... /ddi.12994
Discussion about the evolution, relationships, and naming of New Zealand birds
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- Michael Szabo
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