Selection of Indicator Bird Species as a Baseline for Knowledge Assessment in Biodiversity Survey Studies
Abstract
:Simple Summary
Abstract
1. Introduction
2. Aim of the Study
3. Material and Methods
3.1. Step I: Initial Data Analysis for the Expert Rating
- 1. Avian orders: We used at least one species from each avian order reported in Germany [33]; however, 5 orders were excluded due to their rare occurrence or extremely localized distribution (see Table 1 for details). Correction for Passeriformes: As songbirds (Passeriformes) make up the largest proportion of extant bird species (more than 50% [34]), 86 songbird species were selected, with at least one species from each songbird family (with a few exceptions), to represent each family (Table 1).
- 2. Breeding Bird Numbers: The 118 most common breeding bird species were selected based on the German Breeding Bird Census ADEBAR [29]. Species with a population size larger than 10,000 (measured based on breeding pairs, territories, etc.) were used. Where a range was given, the lowest level was used. This selection is based on a nationwide breeding bird mapping, and it reflects the breeding avifauna. However, some species that fall within the range of the above criteria are largely unknown and poorly observed (e.g., the woodcock (Scolopax rusticola)) but were retained in our first round of selection. Depending on the population size, each species received the following rank: 1. >10,000; 2. >100,000; 3. >1 million.
- 3. Citizen Science data—Garden Birdwatch: CS data come in a variety of forms, from low-level engagement projects (counting garden birds) to more complex and advanced projects (e.g., ringing programs) [35]. The representation of bird species in the general population was used as an additional criterion. Here, we used the CS element of the Garden Birdwatch (“Stunde der Gartenvögel”), which requires only one hour of birdwatching and is open to everyone [7]. This event is run by the nature conservation organization (NGO) NABU, which has a strong base in Germany and in which the German birding scene has its roots. The species recorded during these days can be considered as species that the general public and less trained birders can encounter and identify daily. We used the 130 most common species from this event. The data are based on ranks, with rank 1 = the most commonly reported species.
- 4. Citizen Science data—eBird and Ornitho: More complex CS programs are the online platforms eBird (eBird.org) and Ornitho (ornitho.de). People who use these platforms tend to have higher knowledge and more skills than birders who do not use them [36]. Although these data are extremely useful for scientific analyses, they are slightly biased towards species near wetlands, species near footpaths [31], and larger species [30]. These data reflect the bird species encountered and reported by experienced observers, including summering and wintering species, but also migrants. The use of data from these platforms ensured that non-breeding species were included. The 100 species most commonly reported in Germany from eBird and 50 from Ornitho, extracted on 16 July 2022, at 12:10, were used (data is freely available on the platform). Data were ranked, with rank 1 = the most commonly reported species.
- 5. Citizen Science data—Club 300: Another association providing a platform for birdwatchers is the Club 300 Germany [37]. The platform has a membership fee of only 15 euros per year, which means that no one is excluded from the platform by their financial situation. This platform aims to improve the rapid transmission of information on the occurrence of rare bird species. Club 300 comprises the most knowledgeable and highly specialized birders in Germany [37,38]. However, the requirement to have seen at least 300 bird species in Germany to be admitted to Club 300 has been lifted for a while now. Consequently, there are also members with less than 100 species on the life list in Club 300 [37]. We used the Club List, i.e., the list of all bird species seen in Germany by at least one member of Club 300. We then selected the 100 species that have been seen by the highest number of Club 300 members, extracted on 16 July 2022, at 12:49 (data is freely available on the platform). Based on the number of observers of a species, a rank (1–18) was assigned to it, whereby rank 1 = highest number of observers.
- 6. Lay peoples’ bird preference: In 2021, the NGO NABU (see above) launched a unique challenge to select the most popular bird species in Germany. Based on this selection, the annual election of the Bird of the Year was then organized. Normally, the choice is made by a small commission of experts or by the general public on the basis of a preselection. In 2021, any bird species could be nominated and lay people as well as members of NABU were invited to take part. This vote can be seen as a representation of the status of a species in the eyes of the public and provides an alternative view in addition to the scientific census methods and CS data. Here, we have used the first 50 species selected on the basis of their rank, with rank 1 = the most popular species.
- 7. Previous studies on bird knowledge: As previous studies have already addressed bird species and public knowledge, we added the species that have been already used by Gerl, Randler and Neuhaus [6], Randler [9], Randler and Heil [24], Sturm, Voigt-Heucke, Mortega and Moormann [22], Cox and Gaston [10], Hooykaas, Schilthuizen, Aten, Hemelaar, Albers and Smeets [7], Jaun-Holderegger [39], Wolff and Skarstein [40], and Skarstein and Skarstein [41] to the list. This list comprises all available studies covering the topic in Europe published with a presentation of the respective selected species. Data from Randler [9] and Randler and Heil [24] as well as from Wolff and Skarstein [40] and Skarstein and Skarstein [41] were combined because these data were from the same research groups, so each research group could only contribute once to the dataset. Data were based on the number of research groups in whose studies a respective species was used (coded from 0–7, where 0 = used by no research group and 7 = used by 7 research groups).
- 8. Lay peoples’ assumed knowledge: As a supplement, we used a popular German public book “100 species everyone should know” [42], which covers a wide range of vertebrates and invertebrates; a basic bird identification book (covering 85 bird species; Haag [43]), and three school textbooks from grades 5 and 6 [44,45,46], as birds are especially mentioned in the curricula for these grades. In addition, we used a school textbook from 1933 [47]. This was done to consider what was taught in school at this time, as knowledge about species is often transferred across generations. We analyzed all books for the bird species they contained. The data were based on the number of mentions (coded from 0–6, with 6 = mentioned in all books).
3.2. Step II: Expert Rating 1
3.3. Step III: Expert Round 2
Testing the Suitability of the Expert Round 2
4. Results
4.1. Step I: Initial Data Analysis for the Expert Rating
4.2. Step II: Expert Round 1
4.3. Step III: Expert Round 2
4.3.1. Analysis of the Expert Responses
4.3.2. Analysis of the Species
5. Discussion
6. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Order | Families in this Order (Number of Species in the Initial Selection) | Reason If Not Included in the Initial Selection | Number of Species in Germany 1 | Number of Species in the Initial Selection | Number of Species after Study II | Number of Species in the ‘Golden 50′ |
---|---|---|---|---|---|---|
Galliformes | Phasianidae | 8 | 5 | 2 | 1 | |
Anseriformes | Anatidae | 53 | 21 | 7 | 4 | |
Caprimulgiformes | Caprimulgidae | 2 | 1 | 1 | ||
Apodiformes | Apodidae | 5 | 1 | 1 | 1 | |
Otidiformes | -- | only found in three federal states; very low breeding population of 114 individuals | -- | |||
Cuculiformes | Cuculidae | 3 | 1 | 1 | 1 | |
Pterocliformes | -- | not breeding in Germany, no records in the last 10 years | -- | |||
Columbiformes | Columbidae | 7 | 5 | 4 | 2 | |
Gruiformes | Rallidae Gruidae | 13 | 4 | 3 | 2 | |
Podicipediformes | Podicipedidae | 6 | 3 | 2 | 1 | |
Phoenicopteriformes | -- | limited breeding range; naturalized population, less than 20 pairs | -- | |||
Charadriiformes | Burhinidae Haematopodidae Recurvirostridae Charadriidae Scolopacidae Glareolidae Laridae Stercorariidae Alcidae | 114 | 18 | 4 | 2 | |
Gaviiformes | -- | only rare winter visitors | -- | |||
Procellariiformes | -- | very restricted range to island of Heligoland | -- | |||
Ciconiiformes | Ciconiidae | 2 | 2 | 1 | 1 | |
Suliformes | Sulidae Phalacrocoracidae | 5 | 2 | 1 | 1 | |
Pelecaniformes | Threskiornithidae Ardeidae Pelecanidae | 13 | 3 | 2 | 1 | |
Accipitriformes | Pandionidae Acciptridae | 27 | 11 | 4 | 2 | |
Strigiformes | Tytonidae Strigidae | 12 | 6 | 2 | ||
Bucerotiformes | Upupidae | 1 | 1 | 1 | ||
Coraciiformes | Coraciidae Alcedinidae Meropidae | 4 | 2 | 1 | 1 | |
Piciformes | Picidae | 10 | 7 | 3 | 2 | |
Falconiformes | Falconidae | 9 | 4 | 1 | 1 | |
Psittaciformes | Psittaculidae | 1 | 2 | 1 | ||
Passeriformes | Laniidae | Some families were excluded a priori because of extremely limited breeding ranges or low population size | 8 | 1 | 1 | |
Vireinidae | 2 | 0 | ||||
Oriolidae | 1 | 1 | 1 | |||
Corvidae | 10 | 7 | 7 | 5 | ||
Bombycillidae | 1 | 1 | 1 | |||
Paridae | 7 | 6 | 5 | 2 | ||
Remizidae | 1 | 0 | ||||
Panuridae | 1 | 0 | ||||
Alaudidae | 9 | 3 | 1 | 1 | ||
Hirundinidae | 5 | 3 | 2 | 2 | ||
Cettiidae | 1 | 0 | ||||
Aegithalidae | 1 | 1 | 1 | |||
Phylloscopidae | 15 | 3 | 2 | 1 | ||
Acrocephalidae | 13 | 6 | 1 | |||
Locustellidae | 5 | 1 | ||||
Sylviidae | 12 | 4 | 4 | 1 | ||
Regulidae | 2 | 2 | 2 | |||
Troglodytidae | 1 | 1 | 1 | 1 | ||
Sittidae | 1 | 1 | 1 | 1 | ||
Tichodromidae | 1 | 0 | ||||
Certhiidae | 2 | 2 | 1 | |||
Mimidae | 1 | 0 | ||||
Sturnidae | 2 | 1 | 1 | 1 | ||
Turdidae | 18 | 5 | 4 | 2 | ||
Muscicapidae | 24 | 12 | 6 | 3 | ||
Cinclidae | 1 | 1 | 1 | |||
Passeridae | 4 | 2 | 2 | 1 | ||
Prunellidae | 4 | 1 | 1 | |||
Motacillidae | 15 | 6 | 3 | 1 | ||
Fringillidae | 20 | 11 | 9 | 4 | ||
Calcariidae | 2 | 0 | ||||
Emberizidae | 16 | 4 | 2 | 1 | ||
Parulidae | 2 | 0 |
Data Source | Component (EFA 1 with Experts) | Component (EFA 2 without Experts) |
---|---|---|
Garden Birdwatch (NABU) | −0.842 | −0.842 |
eBird | −0.833 | −0.843 |
Expert Round 1 | 0.825 | |
Books | 0.822 | 0.814 |
Ornitho | −0.779 | −0.778 |
Previous Studies | 0.774 | 0.787 |
Breeding Bird Census (ADEBAR) | 0.743 | 0.771 |
Bird of the Year (NABU) | −0.380 | −0.362 |
Club 300 | −0.208 | −0.217 |
Rank | Species | Scientific Name | Sum |
---|---|---|---|
1 | Common Magpie | Pica pica | 197 |
2 | Common Chaffinch | Fringilla coelebs | 197 |
3 | Eurasian Blackbird | Turdus merula | 197 |
4 | Great Tit | Parus major | 196 |
5 | White Stork | Ciconia ciconia | 195 |
6 | Eurasian Jay | Garrulus glandarius | 195 |
7 | Common Starling | Sturnus vulgaris | 195 |
8 | European Robin | Erithacus rubecula | 195 |
9 | Mute Swan | Cygnus olor | 193 |
10 | Great Spotted Woodpecker | Dendrocopos major | 192 |
11 | Eurasian Blue Tit | Cyanistes caeruleus | 191 |
12 | Mallard | Anas platyrhynchos | 190 |
13 | House Sparrow | Passer domesticus | 188 |
14 | Grey Heron | Ardea cinerea | 185 |
15 | White Wagtail | Motacilla alba | 180 |
16 | Barn Swallow | Hirundo rustica | 178 |
17 | Common Buzzard | Buteo buteo | 178 |
18 | European Goldfinch | Carduelis carduelis | 175 |
19 | Common House Martin | Delichon urbicum | 167 |
20 | Greylag Goose | Anser anser | 165 |
21 | Eurasian Wren | Troglodytes troglodytes | 165 |
22 | Eurasian Bullfinch | Pyrrhula pyrrhula | 164 |
23 | European Greenfinch | Chloris chloris | 161 |
24 | Eurasian Skylark | Alauda arvensis | 160 |
25 | Common Kestrel | Falco tinnunculus | 158 |
26 | Feral Pigeon | Columba livia f. domestica | 158 |
27 | Common Cuckoo | Cuculus canorus | 154 |
28 | Red Kite | Milvus milvus | 151 |
29 | Common Swift | Apus apus | 150 |
30 | Common Kingfisher | Alcedo atthis | 148 |
31 | Carrion Crow | Corvus corone | 148 |
32 | Black Redstart | Phoenicurus ochruros | 146 |
33 | Eurasian Nuthatch | Sitta europaea | 144 |
34 | Common Wood Pigeon | Columba palumbus | 141 |
35 | Eurasian Blackcap | Sylvia atricapilla | 135 |
36 | Yellowhammer | Emberiza citrinella | 134 |
37 | Northern Lapwing | Vanellus vanellus | 133 |
38 | Common Chiffchaff | Phylloscopus collybita | 128 |
39 | Great Cormorant | Phalacrocorax carbo | 124 |
40 | Eurasian Coot | Fulica atra | 124 |
41 | Eurasian Jackdaw | Coleus monedula | 121 |
42 | European Green Woodpecker | Picus viridis | 117 |
43 | Common Crane | Grus grus | 104 |
44 | Common Nightingale | Luscinia megarhynchos | 93 |
45 | Black-headed Gull | Chroicocephalus ridibundus | 92 |
46 | Common Pheasant | Phasianus colchicus | 92 |
47 | Song Thrush | Turdus philomelos | 87 |
48 | Great Crested Grebe | Podiceps cristatus | 77 |
49 | Common Raven | Corvus corax | 56 |
50 | Canada Goose | Branta canadensis | 41 |
r | p | |
---|---|---|
Expert Round 1 | 0.813 | <0.001 |
eBird | 0.736 | <0.001 |
Ornitho | 0.708 | <0.001 |
Google Search Results | 0.703 | <0.001 |
Garden Birdwatch (NABU) | −0.700 | <0.001 |
Previous Studies | 0.667 | <0.001 |
Bird of the Year (NABU) | −0.634 | <0.001 |
Books | 0.613 | <0.001 |
Breeding Bird Census (ADEBAR) | 0.325 | <0.001 |
Club 300 | 0.269 | 0.006 |
Body Mass | 0.207 | 0.037 |
Colourfulness | 0.069 | 0.491 |
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Härtel, T.; Vanhöfen, J.; Randler, C. Selection of Indicator Bird Species as a Baseline for Knowledge Assessment in Biodiversity Survey Studies. Animals 2023, 13, 2230. https://doi.org/10.3390/ani13132230
Härtel T, Vanhöfen J, Randler C. Selection of Indicator Bird Species as a Baseline for Knowledge Assessment in Biodiversity Survey Studies. Animals. 2023; 13(13):2230. https://doi.org/10.3390/ani13132230
Chicago/Turabian StyleHärtel, Talia, Janina Vanhöfen, and Christoph Randler. 2023. "Selection of Indicator Bird Species as a Baseline for Knowledge Assessment in Biodiversity Survey Studies" Animals 13, no. 13: 2230. https://doi.org/10.3390/ani13132230