Research Ideas and Outcomes :
Research Article
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Corresponding author: Vazrick Nazari (nvazrick@yahoo.com)
Received: 29 Apr 2021 | Accepted: 01 Jun 2021 | Published: 04 Jun 2021
© 2021 Vazrick Nazari
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Nazari V (2021) Taxonomy at Face Value: An assessment of entomological postage stamps as effective teaching aids for science educators. Research Ideas and Outcomes 7: e68056. https://doi.org/10.3897/rio.7.e68056
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Entomological postage stamps are unique means of communication of science with the public and have been suggested as effective teaching tools in primary and secondary education. A survey of the taxonomic and other information contained on insect- and arachnid-themed stamps issued globally from 1891 to 2020 reveals that 30% of these stamps contain various errors and are scientifically unreliable. In addition, representations of insects are highly biased towards only two orders (Lepidoptera and Odonata), while other mega-diverse orders (e.g. Coleoptera, Diptera, Hymenoptera) are poorly represented or not represented at all. This phenomenon can negatively affect public perception of priorities in biodiversity and conservation. Standardization of taxonomic information on entomological stamps and implementation of rigorous quality control measures are encouraged to assure dissemination of accurate scientific information.
Philately, insects, entomophilately, taxonomic bias, science education
Postage stamps are unique outlets for countries to showcase important issues, raise public awareness, and commemorate persons or events of national significance. Stamps are windows into the art and culture of nations, and they document the spirit of time when they were designed and published. Thus, subjects represented on stamps are by nature wide and varied. With millions of hobbyists worldwide, stamp collecting is among the top past-times and its contribution to global economy is non-trivial.
Most philatelists are thematic stamp collectors specializing only on particular topics. Thematic catalogues exist for many subjects in biology, including for fungi (
It should not be surprising that the animal diversity represented on stamps does not accurately reflect the real world: While charismatic fauna appear frequently on stamps, obscure taxa are regularly neglected (
A list of unique depictions of insects and arachnids on postage stamps issued until 31 December 2020 was compiled using various published and online catalogues (Suppl. material
Each stamp was individually databased and studied for accuracy of the scientific names and depictions of insects. Each unique insect depiction was given a separate entry; e.g. five species on a single stamp received five separate entries, while multiple specimens of the same species on a stamp were counted as one. Where life history was depicted, early life stages (caterpillars or chrysalis) were noted but not included in the count. Overprints and surcharges were not counted separately. The final list contained 20341 entries, 551 of which were Arachnids.
Verbatim IDs on stamp were recorded and separately adjusted according to the most current taxonomy. Unidentified species and higher classifications were all determined by the author. Errors and other discrepancies were noted and classified under six general categories:
a) Insufficient taxonomy: no taxonomic information, common names only, ID to some level above species, abbreviated family or genus names; b) Incorrect taxonomy: Misidentifications, mix-up of names in mini-sheets, incorrect spelling of scientific, common or author’s names, association errors (subspecies assigned to incorrect species, species assigned to incorrect genus), misallocations (genus and species epithet transposed), missing genus names, incorrect author or year; c) Incorrect information: Incorrect common name, count, geography, gender, cast, life stage etc., other spurious information; d) Typographical errors: Incorrect spacing, unnecessary or missing characters, problems with selected fonts resulting in loss of information; e) Presentation errors: Poor drawings, incorrect colors, inaccurate wing shapes or sizes, mix-up of upper- and underside of the wings; f) Other: Unusual combinations, common names used as scientific names or vice versa, ‘Frenchified’ scientific name used as common name (e.g. Centrote Cornu).
Errors resulting from production (perforation, offset, overprints etc.) were excluded. Certain inaccuracies, such as out-of-date taxonomies, incorrect capitalization or italization of scientific names, or impossible juxtapositions of species belonging to separate biogeographical realms were ignored primarily due to their overwhelming prevalence.
Depictions of each insect or arachnid order were counted separately for every issuing authority. Diversity was estimated using Shannon’s and Simpson’s indices for each country: Simpson’s diversity index is a measure of dominance within a community and is weighted towards common species, while Shannon’s index is a measure of evenness that combines species composition and abundance (
Number of representation of insects varied greatly by country and overtime, but the overall trend showed a steady increase since the 1950s (Fig.
The first insect depicted on a stamp is a butterfly ornament in the hair of Queen Liliuokalani (1838-1917), on a Hawaii stamp issued in 1890 (Scott’s stamp number: US-HA52). In 1902, four stylized Hippotion celerio (Lepidoptera: Sphingidae) decorated the corners of Queen Wilhelmina’s portrait on a series of monochrome stamps issued by Netherland’s East Indies (NL-IN48-58), and the first insect stamps in full color are a series published by Switzerland in 1950 (CH B197-200). None of those, however, had any scientific identifications. The First insect stamp with a scientific ID was issued also in 1950 by Sarawak, depicting a Rajah Brooks birdwing, “Troides brookiana” (Lepidoptera: Papilionidae) alongside King George VI’s portrait (MY-SR180).
Themes. Beside simple individual portrayals where an insect is the main theme of the stamp, insects also appear in various scientific contexts, including biodiversity, conservation, biological control, diseases and their vectors, entomophagy, extinction and fossils, beneficial and harmful insects, mimicry, natural enemies of insects, parasitism, insect migration, insect products, pest control, and pollination. Scenes of collecting or studying insects are not uncommon on stamps. Insects sometimes accompany portraits of famous entomologists, politicians, Nobel laureates, athletes, and scouts. Biological curiosities, such as aberrations and gynandromorphs, have been depicted a few times on stamps, as well as yet unnamed new insects (e.g. “Discovered 2001: Working name - gladiator, order: Mantophasmatodea”; Namibia 2003, NA1010). One species inaugurated on a stamp is “Othreis toddi, Zayas (In Litt.)” (Lepidoptera: Noctuidae) (Cuba 1961, CU696); this name appeared on the stamp four years prior to its official description in a scientific paper (
Other popular themes in which insects have been incorporated include art, archaeology, astronomy, children’s animations, books and toys, ceramics, coins, costumes, dance, drama, ex-libris, fairy tales, flags, graphic arts, handicrafts, heraldry, jewelry, literature, medieval manuscripts, music, pop culture, petroglyphs, recycling, sculpting, space, and sports. Honeybees appear in beekeeping scenes, spiders on Halloween-themed stamps, and dung beetles and wasps on stamps about ancient Egypt. Fruit flies appear on stamps about genetics, while stamps with themes on economy and saving often depict ants. Some of the political topics in which insects have appeared include women’s liberation, nuclear proliferation, justice and freedom, enhancement of quality of life, gender equality, environmental protection, Individuality, integration of disabled people, and racism.
Uneven taxonomy. Overall, depictions of three arachnid and twenty-five insect orders were found on stamps. Unidentifiable insects and arachnids were counted under two general order-level categories “Insecta” and “Arachnida”, resulting in a total of 30 orders. Schematic insects appeared frequently on stamps as decorative elements or as part of organizational or event logos; since a scientific ID is not expected in those cases, all stylized depictions (1271 of 20341) were excluded from analyses. Among the remaining depictions, 3440 (18%) had no ID and 1006 (5.2%) were presented only with their common names. Among those with a scientific ID, 18 were identified only to order, 4 to superfamily, 136 to family, 15 to subfamily, 2 to tribe, 1 to subtribe, 315 to genus, 14095 to species (64 without generic assignment, 12 with sub-generic assignments), 918 to subspecies, and 14 to infra-subspecific names (forms and varieties). Overall, only 1078 scientific names included author’s name or abbreviation, and only 53 of those also included the year of description. Scientific names were presented in various levels and combinations (Suppl. material
Taxonomic bias. Lepidoptera unequivocally dominated entomological stamps (69%), followed distantly by Coleoptera (9%) and Hymenoptera (9%)(Fig.
Entomological stamps issued relative to the number expected to be issued assuming that stamp issuing should reflect the actual species diversity in each insect order. Blue bars show taxa for which stamp issuing was greater than expected, and red bars show taxa for which stamp issuing was lower than expected (x −1). Differences between observed and expected values were not significant in orders that are not shown (Chi-square test, P > 0.001).
Within some orders, skewed representation towards charismatic or important species was observed. Anopheles mosquitoes dominated depictions in Diptera (56%) mainly due to the series of stamps issued globally for the campaign against Malaria in 1962, while honeybees (31.2%) were the prevalent depiction in Hymenoptera. With 289 depictions, the Monarch (Danaus plexippus) was the most common Lepidopteran species on stamps. Despite their dominance, so far only 34% of families, 7% of genera and 2% of species of Lepidoptera have been represented on stamps. Among butterflies, all six families (except Hedylidae), 36% of genera and 13.1% of species have been depicted, with the highest number of species in Papilionidae (53.5%), and much smaller proportions for Hesperiidae (2.88%), Riodinidae (6.23%) and Lycaenidae (7.41%).
Diversity Index. Most countries depicted insects in 1–7 orders, and with 15 insect orders depicted, Mozambique had the highest richness. In assessing the diversity and abundance of insect orders, Shannon’s diversity index (H) was found to be more informative in defining diversity. Among countries issuing insect stamps, Qatar (number of stamps n=37) had the highest H diversity (H=2.07), followed by Canada (n=43, H=2.02) and Upper Volta (n=22, H=1.94). Many of the countries with greater numbers of entomological stamps showed much lower diversity, for example São Tomé and Príncipe (n=611, H= 0.67), Guinea-Bissau (n=651, H=0.82) and Guinea (n=799, H=1.11) (Fig.
Errors. Observed errors were classified under six general categories: Insufficient taxonomy, incorrect taxonomy, incorrect information, typographical errors, presentation errors, and other (see Fig.
Examples of errors on stamps. Numbers shown are Scott’s stamp numbers (Sn). No scientific or common names: A) (Phaeostigma notata, Raphidioptera); Misidentifications: B) “Monarch” (Euphaedra coprates, Nymphalidae); C) “African Violets Saintpaulia ionanthe” (Alcides metaurus, Uraniidae); D) “Cymbospondylus” [Ichthyosaur!] (Utetheisa ornathrix, Erebidae); E) “Ephemera Denica” (Rhyssa sp., Ichneumonidae); F) “Bhutanitis lidderdalii” (Attacus atlas, Saturniidae); G) “Unidentified taxco” (Melanis cephise, Riodinidae); Misspelling of scientific and common names: H) “Checked White Pontina protodice” (Checkered White Pontia protodice); Incorrect information: I) “Kallima inachus (Eastern Europe)” (Oriental species); J) “Lomagostus jeanneli n. sp.” (species described by Villiers in 1958); Poor depictions: K) “Citrus Swallowtail – Papilio demodocus” (stylized butterfly); L) “Cymothoe sangaris” (this is a red species); M) “Diaethria neglecta” (uppersides of wings shown as undersides and vice versa).
Entomological postage stamps have been suggested as effective teaching aids in primary and secondary education (
Accurate and replicable taxonomic identification is the cornerstone of biology, without which entomological research risks becoming irreproducible and thus unscientific. Insects identified by unqualified persons often introduce errors in literature that take decades to rectify (
Among the 20341 depictions examined, the source of identifications for depicted specimens was not provided even once. Considering their wide-ranging effects, these identifications should always be performed by professionals and peer-reviewed for accuracy by qualified entomologists. Packer and colleagues (
It is important to note that even though 30% of entomological stamps are not scientifically reliable, the remaining 70% are so to various extents, and as such they do indeed provide a unique and valuable resource for educators. Science communicators should remain cautious and skeptical when teaching taxonomy using stamps, however, the remarkable diversity of other themes represented and the various contexts in which insects appear on entomological stamps provide an excellent avenue to familiarize students with aspects of entomology in art, culture, science and everyday life around the world.
I would like to thank Michael J. Raupach (München, Germany) for his review and helpful comments on an earlier draft of this paper.
First row shows number of stamps with no taxonomic information where the depicted insect was the primary subject of the stamp.