September records of Hoverflies (Diptera: Syrphidae) at the Mercantour National Park and its surroundings: a mixture of migratory and resident species

This is the data of Nève G., Bennett D., Bot S., Hadrava J., Hadravová T., Hlaváček A., Mazánek L., Mengual X., Nidergas V., Ricarte A., Ssymank A., Van de Meutter F., van der Ent L-J., van Steenis J., van Steenis W. & Wakkie B. 2026. September records of Hoverflies (Diptera: Syrphidae) at the Mercantour National Park and its surroundings: a mixture of migratory and resident species. Journaal van Syrphidae 5(1): 1–16.https://doi.org/10.55710/1/CXCG8231 This version 2 corrects some locality and department names and adds some altitudes in the data set. Records of Syrphidae, collected and observed by participants of the 11th International Symposium on Syrphidae are presented. As relatively small numbers of September records exist for many syrphid species from France and Italy, this event made an important contribution to our knowledge of the phenology of many species. A total of 1229 Syrphidae specimens, belonging to 104 species, were recorded in six French departments, together with the Cuneo Province, Italy. Most of the 923 specimens recorded in the upper Ubaye valley (Alpes-de-Haute-Provence) belong to migratory species, which all have predatory larvae. Eristalis tenax and E. arbustorum are the exceptions, with larvae that are aquatic filter-feeders on micro-organisms. The proportion of specimens from migratory species increased with altitude. Ten records are new departmental records for France, and two are new for Cuneo province, Italy. Data in presented Darwin core: TSV format, encoding is UTF-8, compatibe with GBIF system. Fields are separated by tabulations. Beware of apostrophes (') in some locality names or comments, as these may be misinterpreted by R statistical system. ‘1’ in the identificationVerificationStatus column indicates that the specimen could be identified at the specific level, and that its identification can be taken as sure. If there is any doubt, ‘cf’ is indicated in identificationQualiflier and ‘0’ is encoded in the identificationVerificationStatus column, and details are given in the identificationRemarks column. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 Licence. All work derived from the present study should cite it appropriately, including the associated reference. Some tips on how to open this file are given in the associated Read_me_Neve_et al_2026_Syrphidae_Mercantour.pdf file. The columns of the data set are : occurrenceID: Individual identification code. basisOfRecord: The specific nature of the data record (i.e. either PreservedSpecimen for the entomological collections or human observation for field data only)eventDate Event date of specimen capture or observation in the format YYYY-MM-DD.year: Year of event.month: Month of event.day: Day of eventverbatimEventDate: Date of capture, as mentioned on the label.kingdom: Kingdom name (i.e. Animalia).phylum: Phylum name (i.e. Arthropoda).class: Class name (i.e. Insecta).order: Class name (i.e. Diptera).family: Family name (i.e. Syrphidae)previousIdentifications: Species name originally given on the specimen label, if any.genus: Genus name.specificEpithet: Species epithet of the scientificName.scientificName: Lowest taxonomic rank possible given to the specimen, usually the species name, sometimes the genus, with author and year.sex: Male (M) or female (F).taxonRank: species or genus.identificationQualifier: In case the identification could be given only to a species group, 'cf.' was input.identificationRemarks: Any comment on the identification of the specimen, with list of other possible species.IdentifiedBy: Name of the entomologist who identified the specimen.identificationVerificationStatus: Whether (coded 1) or not (coded 0) the identification is reliable at the species levelcountry: Country of capture.countryCode: Two letter country code of the specimen capture location.stateProvince: French departmental or Italian Province administrative division.locality: Location of capture, usually the municipality.verbatimLocality: Any geographical indication, as it is written on the label or in the notebook.decimalLatitude: Geographic latitude (in decimal degrees) of the capture location.decimalLongitude: Geographic longitude (in decimal degrees) of the capture location.coordinateUncertaintyInMeters: Uncertainty in coordinates, in meters (i.e. c. 100 m).recordedBy: Name of collector (i.e. legit information)occurrenceRemarks: Any available ecological dataminimumElevationInMeters: Lower limit of the range of altitudesmaximumElevationInMeters: Higher limit of the range of altitudesgeodeticDatum: System and set of reference points upon which the geographic coordinates are based (i.e. WGS84)georeferenceProtocol: How the georeference was computed, i.e. from field GPS label data or from geoportail.gouv.fr.georeferencedDate : Year of the georeference (i.e. 2022)CollectionCode: Name of the collector who kept the specimensorganismQuantity: Number of individuals in the recordorganismQuantityType: Individuals.language: The dataset is written in English.associatedReferences: Any reference citing the relevant specimen