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Auteur Justin J. F. J. Jansen |
Documents disponibles écrits par cet auteur (5)
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Article
Graeme M. Buchanan, Auteur ; Ben Chapple, Auteur ; Alex J. Berryman, Auteur ; Nicola Crockford, Auteur ; Justin J. F. J. Jansen, Auteur ; Alexander L. Bond, AuteurIn the current biodiversity crisis, conservation efforts are often focused on extinction prevention. However, it can be difficult to determine if a species is extinct, especially if the species has an extensive range, including being a transcont[...]![]()
Article
Graeme M. Buchanan, Auteur ; Ben Chapple, Auteur ; Alex J. Berryman, Auteur ; Nicola Crockford, Auteur ; Justin J. F. J. Jansen, Auteur ; Alexander L. Bond, AuteurIn the current biodiversity crisis, conservation efforts are often focused on extinction prevention. However, it can be difficult to determine if a species is extinct, especially if the species has an extensive range, including being a transcont[...]![]()
Article
Justin J. F. J. Jansen, Auteur ; C. S. Kees Roselaar, AuteurThe egg collection of Naturalis Biodiversity Center at Leiden, the Netherlands - founded in 1820 - contains no less then 118 635 eggs from 37 758 clutches from c 128 countries. Some of these clutches are from the rarest Dutch breeding species. I[...]![]()
Article
Justin J. F. J. Jansen, Auteur ; Wim Nap, AuteurWhite-headed Long-tailed Bushtit Aegithalos caudatus caudatus (hereafter caudatus) has been reported more or less annually in the Netherlands since many years. It has never been considered by the Dutch rarities committee (CDNA) and reports are r[...]



