Justin J.F.J. Jansen

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• dr.
• Research Associate at Naturalis Biodiversity Center

Intracontinental biotic divisions across the vast Palaearctic region are not well-characterized. Past research has revealed patterns ranging from a lack of population structure to deep divergences along varied lines of separation. Here we compared biogeographic patterns of two Palaearctic shorebirds with different habitat preferences, Whimbrel (Num...

We describe a new species of Polynesian sandpiper from Henderson Island, Prosobonia sauli sp. nov., based on multiple Holocene fossil bones collected during the Sir Peter Scott Commemorative Expedition to the Pitcairn Islands (1991–92). Prosobonia sauli is the only species of Prosobonia to be described from bone accumulations and extends the record...

The expedition commanded by the Frenchman Nicolas Thomas Baudin aboard the ships Le Géographe and Le Naturaliste (and Le Casuarina for the return journey) to the southern hemisphere between 1800-1804 collected specimens from numerous locations including the Canary Islands (Tenerife), Île de France (Mauritius), Cape Town (South Africa), Australia an...

Understanding the relative contributions of historical and anthropogenic factors to declines in genetic diversity is important for informing conservation action. Using genome-wide DNA of fresh and historic specimens, including that of two species widely thought to be extinct, we investigated fluctuations in genetic diversity and present the first c...

The role of Temminck in Ornithology

In 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 transcontinental migrant, or is poorly known. The breeding range of the migratory Critically Endangered Slender‐bi...

Le Beffroi Musée Boucher de Perthes-Manessier, Abbeville, France, houses an ornithological collection totalling 2,597 mounted birds, principally from the 19th century. According to the current IUCN Red List of threatened species, the mounts represent 112 extinct or endangered (‘E&E’) bird taxa (156 specimens in total). We list the specimens of ‘E&E...

The Laysan Finch Telespiza cantans was described by Scott Wilson in 1890, based on a caged bird he acquired in Honolulu. He described its range as Midway Island, which soon proved to have been mistaken for Laysan Island. Wilson was told that it had arrived in Honolulu about March 1888 on the schooner “Mary Bohm”. Following the discovery of the simi...

This paper assesses the use of the patterning of P5 and P6 in distinguishing Steppe Whimbrel Numenius phaeopus alboaxillaris from Eurasian Whimbrel N. p. phaeopus as proposed by Allport (2017) and Campbell et al (2022). Examination of 125 Whimbrels, including specimens of N. p. variegatus, demonstrates that the range of variation is greater than de...

In this article, a reconstruction is made of an opportunistic drive hunt of a pod of about 38 long-finned pilot whales (Globicephala melas) which took place on 9 April 1825 near St. Philipsland (Zeeland, the Nether- lands). The reconstruction is based on published and non-published documents, artistic impressions, and five complete skeletons and on...

Blauwe Klauwier

Blauwe Klauwier

Blauwe Klauwier

Understanding the relative contributions of historical and anthropogenic factors to declines in genetic diversity is important for informing conservation action. Using genome-wide DNA of fresh and historic specimens, including that of two species widely thought to be extinct, we investigated fluctuations in genetic diversity and present the first c...

On 25 November 1909, a grey shrike Lanius was purchased by Rijksmuseum voor Natuurlijke Historie (now Naturalis Biodiversity Center) at Leiden, Zuid-Holland, Netherlands (skin RMNH.AVES.1663). The bird, a first-winter female, Noord-Brabant, Netherlands, in November 1909. It was at the time identified as Great Grey Shrike L excubitor. After recent s...

The extinct Kiritimati Sandpiper Prosobonia cancellata is known from a single contemporaneous illustration by William Wade Ellis and a description by William Anderson. We reproduce Ellis' illustration for the first time, and we consider the illustration as almost in line with Anderson's description. Further, using both Anderson's work and Ellis' il...

The Ornithology of the Baudin Expedition (1800-1804)

We re-examined the putative type specimen of Society Kingfisher Todiramphus veneratus (J. F. Gmelin, 1788) in the Naturhistorisches Museum Wien (NMW 50.633) and conclude based on plumage that it represents the taxon from Moorea, T. veneratus youngi Sharpe, 1892, rather than nominate T. veneratus veneratus from Tahiti. X-rays reveal that it was prep...

The results of archival and collection research into the expedition led by Nicolas-Thomas Baudin in 1796–1798 to Tenerife, St. Thomas, St. Croix, and Puerto Rico are herein presented. The expedition brought home at least 296 specimens and was the first to collect in St. Thomas, St. Croix, and Puerto Rico. Of these, at least 140 specimens still surv...

Link for this PhD thesis: https://openaccess.leidenuniv.nl/handle/1887/62332

The Slender-billed Curlew (Numenius tenuirostris) is for the last time reliably recorded at 23 February 1995 at Merja Zerga, Morocco. This paper re-evaluates the recent addition by Hudeček (2016) of the species to the Czech Republic list.

This paper is a follow-up to Jansen 2014 and Jansen 2016b. There are 228 Australian bird specimens preserved in European museums today, collected in 1801–1803 during the expedition commanded by Nicolas Baudin to Australia and Timor. No less than 397 specimens accumulated during the Baudin expedition still survive. The Australian bird collection mad...

The 'I'iwi Drepanis coccinea was discovered during James Cook's third circumnavigation (1776-80) and described by G. Forster in 1781. Several possibly authentic specimens and data sources linked to the original expedition exist. However, investigations into preparation style of the various 'I'iwi specimens in question identified five different work...

The arrival of two living Samoan Fruit-doves Ptilinopus fasciatus on 7 June 1803 in the harbour of Le Hâvre, France with the return of one of the Baudin expeditionary vessels, the Naturaliste, marked the arrival of the first live birds from the tropical Pacific in Europe. More specimens from the tropical Pacific followed on 24 March 1804 when the s...

The French collector René Maugé (1757-1802) conducted some bird-collecting excursions when anchored in Kupang Bay, West-Timor during his time as part of the French government-funded expedition commanded by Nicolas Baudin (1754-1803). The expedition docked at Tenerife (Spanish Canary Islands), Mauritius, Australia, Timor and South Africa between 180...

Coenraad Jacob Temminck (1778-1858) was the first director of the Rijksmuseum Natuurlijke Historie in Leiden, The Netherlands. His large private collection of specimens, composed primarily of birds and mammals, was listed by him in a catalogue published in 1807. However, an unpublished catalogue in Temminck's hand, drafted by him about four years e...

Lee & Holyoak (2017) focused on Lesson as a source that we had neglected in our discussion of Chattering Kingfisher Todiramphus tutus on Tahiti. They are apparently confident in the accuracy of specimen labels from Lesson’s era despite that the labelling of even Lesson’s own specimens is poor. Based on meticulous notes taken during the Whitney Sout...

Mystery has surrounded the identity of aground dwelling bird collected in February 1803 on St Peter Island in Denial Bay, Eyre Peninsula by Charles-Alexandre Lesueur, one of two artists of the Baudin Expedition. Despite the existence of its illustration and supporting descriptive notes contained among the large residual Lesueur Collection in Le Hav...

This paper is a follow-up of Jansen (2014) and provides details on discrepancies between the actual number of bird specimens collected on the Baudin expedition (1800-1834) in both the literature as well as in archives and provides a review of how specimens were treated after their arrival and how they were documented. Louis Dufresne (1752-1832) pla...

Yellow-tufted Honeyeater Lichenostomus melanops was described under four different English names and three Latin binomials by Latham (l801a,b, 1822). Until now, these names were usually thought to be based solely on four watercolours produced during the early years of settlement in Australia, one of which was established by Sharpe (1906) as the 'ty...

The founding of the Muséum national d'Histoire naturelle, Paris, France, in 1793 marks a historical milestone in the development of natural history. The museum's collections subsequently grew rapidly due to acquisitions, donations and exchanges. The first years of the museum in particular were crucial in developing its role amongst the various priv...

Chattering Kingfisher Todiramphus t. tutus is endemic to the Society Islands, French Polynesia, but is poorly known on the main island of Tahiti. We evaluated historic and recent evidence for the species’ occurrence there, reviewing 115 specimens of Chattering Kingfisher in museums worldwide. Andrew Garrett collected most specimens in the 1870s on...

We discuss the provenance of two specimens claimed to be the type of Chattering Kingfisher Todiramphus tutus: one each in Liverpool, UK, and Leiden, the Netherlands. The type was collected during Cook’s third voyage. Our research indicates that neither is the type specimen, which is probably now lost, like most Cook specimens. Instead, both may hav...

Only nine skins of the extinct Falkland Islands wolf, Dusicyon australis, are currently known in museum collections. In this article we present the results of locating these specimens with a special focus on the origins of two mounted skins in Naturalis Biodiversity Center, Leiden and in the Swedish Museum of Natural History, Stockholm, Sweden. Alt...

Lesser Kestrel Falco naumanni Fleischer, 1818 (Falconiformes Falconidae) is considered a monotypic species. F. naumanni pekinensis Swinhoe, 1870 was described from Beijing, China. Although considered valid for most of the 20th century, some authors treated F. naumanni pekinensis as a synonym of F. naumanni naumanni, and subsequent authors have sinc...

The expedition led by Nicolas Baudin (1754-1803) to Australia (1800-04) was by far the largest of the European expeditions to Australia and Timor undertaken up to that date. Despite the number of bird specimens collected during the expedition, the original records documenting their identity, origin and disbursement have long been neglected. Only a...

The identity and provenance of four 19th-century Amytornis grasswren specimens in the Naturalis Biodiversity Center (Leiden) collection are reviewed. Three identified as Thick-billed Grasswren Amytornis modestus inexpectatus enable a revised diagnosis for the extinct subspecies from New South Wales. One of these and one Striated Grasswren A. striat...

Hawaiian Rail Porzana sandwkhensis is an extinct species of crake from the Hawaiian archipelago that was endemic to the island of Hawaii. The provenance of the two types in Leiden and Vienna is shrouded in mystery, as their early history is incomplete and both changed hands before reaching their current destinations. Furthermore, one or both specim...

Op 23 augustus 2009 werd door Kell Eradus een eerste zomerkleed Dwerggans Anser erythropus gevonden op de Lage Wijth te Grave. De vogel betrof een eerste zomerkleed, herkenbaar door de onontwikkelde vlekken op de borst, vale pootkleur en snavelkleur. Deze vogel werd alleen deze dag hier waargenomen, latere waarnemingen zouden vooral volgen uit de K...

Is Veenpatrijs een valide ondersoort van Patrijs? Patrijs Perdix perdix is een van oorsprong Euraziatische soort met zeven beschreven ondersoorten. Eén daarvan is Veenpatrijs P p sphagnetorum in Noordoost-Nederland en aangrenzend Duitsland. Kelm (1979) beweerde echter in zijn onderzoek dat sphagnetorum een veel ruimer verspreidingsgebied heeft, inc...