id	68625
datum	4 oktober 2016
gemeente	Rotterdam (ZH)
locatie	Tweede Maasvlakte, Prinses Maximaweg
coördinaten	N 51.95399  O 3.9643
aantal, kleed	1, 1cy
soort waarneming	veldwaarneming
status	Aanvaard, gepubliceerd in jaarverslag CDNA
waarnemer(s)	A Kolders, J Vlot, E B Ebels et al;
opmerkingen	mtDNA and nuDNA analyses (based on faecal sample) stored in GenBank, photographed, videoed (Ebels et al 2021; Dutch Birding 43: 208, plate 268-270, 210, plate 271-274, 2021). Although reported as a probable Lanceolated Warbler in the field, this poorly marked individual stirred quite a debate over its identity despite many available photographs. A faecal sample was collected but it was unfortunately contaminated with sand. Siliciumoxide (a main component of sand) and DNA sequences are not good friends. It therefore took the lab quite some work to sequence the mtDNA that revealed its genetic identity as Lanceolated. New assays were set up in order to also get a full genome analysis from this ‘difficult’ sample. This analysis finally succeeded in 2020 and also matched Lanceolated. The genetic data were stored in GenBank more than four years after the sighting, after which the sighting was submitted and accepted. Annual Report 2020.

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