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Kaspar Delhey

Kaspar Delhey

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 36 1616 1489 53 52 102 4697
Ecology and Evolution 37 6923 6688 360 354 106 4858

Kaspar Delhey publications per year

The chart shows the history of publications by Kaspar Delhey between 1998 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kaspar Delhey published across 28 years, from 1998 to 2025, averaging 4.2 papers a year. Output peaked at 14 publications in 2017. 5 of the 117 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1998 to 2025. Vertical axis: number of publications, 0 to 14. Peak 14 publications in 2017. 1998: 1 publication 1999: 0 publications 2000: 0 publications 2001: 2 publications 2002: 2 publications 2003: 3 publications 2004: 3 publications 2005: 2 publications 2006: 3 publications 2007: 7 publications 2008: 5 publications 2009: 0 publications 2010: 5 publications 2011: 3 publications 2012: 3 publications 2013: 4 publications 2014: 0 publications 2015: 5 publications 2016: 8 publications 2017: 14 publications 2018: 6 publications 2019: 9 publications 2020: 8 publications 2021: 9 publications 2022: 6 publications 2023: 4 publications 2024: 2 publications 2025: 3 publications
1998 2025

117 publications in total across all disciplines

View publications per year as a table
Kaspar Delhey: publications per year, 1998 to 2025
Year Publications
1998 1
1999 0
2000 0
2001 2
2002 2
2003 3
2004 3
2005 2
2006 3
2007 7
2008 5
2009 0
2010 5
2011 3
2012 3
2013 4
2014 0
2015 5
2016 8
2017 14
2018 6
2019 9
2020 8
2021 9
2022 6
2023 4
2024 2
2025 3
Total 117
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Kaspar Delhey publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Kaspar Delhey sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 84 bars. Horizontal axis: publications, 29–33 to 442+. Vertical axis: number of scientists, 0 to 109. Most scientists, 109, have 119–123 publications. The last bar groups every scientist with 442 publications or more. The highlighted bar, 99–103 publications, is where this scientist sits. 29–33 publications: 1 scientist 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29–33 publications 442+

This scientist: 102 publications — 28th percentile

28% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

View publications distribution as a table
Number of Animal Science and Veterinary scientists by publication count, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
Publications Scientists This scientist
29–33 1
34–38 6
39–43 17
44–48 23
49–53 28
54–58 44
59–63 66
64–68 75
69–73 71
74–78 85
79–83 108
84–88 105
89–93 84
94–98 103
99–103 97 102
104–108 95
109–113 89
114–118 88
119–123 109
124–128 93
129–133 89
134–138 95
139–143 92
144–148 80
149–153 75
154–158 74
159–163 67
164–168 53
169–173 62
174–178 63
179–183 50
184–188 55
189–193 50
194–198 27
199–203 44
204–208 31
209–213 28
214–218 38
219–223 33
224–228 36
229–233 29
234–238 35
239–243 23
244–248 24
249–253 29
254–258 28
259–263 21
264–268 25
269–273 11
274–278 18
279–283 13
284–288 18
289–293 10
294–298 12
299–303 11
304–308 15
309–313 14
314–318 14
319–323 8
324–328 8
329–333 13
334–338 14
339–343 13
344–348 10
349–353 11
354–358 5
359–363 8
364–368 8
369–373 6
374–378 7
379–383 8
384–388 3
389–393 4
394–398 5
399–403 8
404–408 5
409–413 4
414–418 3
419–423 8
424–428 5
429–433 3
434–438 5
439–441 5
442+ 99
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Kaspar Delhey D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Kaspar Delhey sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 58 bars. Horizontal axis: D-Index, 20 to 77+. Vertical axis: number of scientists, 0 to 158. Most scientists, 158, have 31 D-Index. The last bar groups every scientist with 77 D-Index or more. The highlighted bar, 36 D-Index, is where this scientist sits. 20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 36 D-Index — 50th percentile

50% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

View D-Index distribution as a table
Number of Animal Science and Veterinary scientists by D-index, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
D-Index Scientists This scientist
20 5
21 22
22 31
23 44
24 53
25 66
26 80
27 101
28 106
29 116
30 154
31 158
32 143
33 137
34 126
35 134
36 112 36
37 115
38 105
39 111
40 107
41 87
42 74
43 62
44 61
45 41
46 51
47 43
48 28
49 47
50 40
51 34
52 33
53 43
54 16
55 32
56 21
57 18
58 28
59 33
60 17
61 21
62 18
63 21
64 9
65 20
66 11
67 16
68 12
69 17
70 13
71 15
72 11
73 11
74 14
75 5
76 6
77+ 100
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Overview

Kaspar Delhey is affiliated with the Max Planck Society in Germany. Their research primarily spans the fields of Agricultural and Biological Sciences and Environmental Science, with notable focus on Ecology, Evolution, Behavior and Systematics.

Their main research topics include Animal Behavior and Reproduction, Plant and animal studies, Avian ecology and behavior, Species Distribution and Climate Change, Wildlife Ecology and Conservation, Amphibian and Reptile Biology, and Primate Behavior and Ecology.

Kaspar Delhey has contributed to several recent scientific publications, including:

  • Cooperative breeding and the emergence of multilevel societies in birds, 2022, Ecology Letters
  • Ornaments are equally informative in male and female birds, 2022, Nature Communications
  • Evolutionary predictors of the specific colors of birds, 2023, Proceedings of the National Academy of Sciences
  • Is color data from citizen science photographs reliable for biodiversity research?, 2021, Ecology and Evolution
  • Hot and dry conditions predict shorter nestling telomeres in an endangered songbird: Implications for population persistence, 2022, Proceedings of the National Academy of Sciences

The scientist frequently publishes in the following venues:

  • Behavioral Ecology
  • Ecology Letters
  • Proceedings of the National Academy of Sciences
  • Journal of Animal Ecology
  • Journal of Evolutionary Biology

Kaspar Delhey often collaborates with fellow researchers including Mihai Vâlcu, Bart Kempenaers, Anne Peters, James Dale, and Alexandra McQueen. These collaborations reflect overlapping interests in behavioral and ecological studies within their field.

Best Publications

  • Females increase offspring heterozygosity and fitness through extra-pair matings

    Katharina Foerster;Kaspar Delhey;Arild Johnsen;Jan T. Lifjeld

  • The effects of life history and sexual selection on male and female plumage colouration

    James Dale;Cody J. Dey;Kaspar Delhey;Bart Kempenaers

  • Carotenoid‐based bill colour as an indicator of immunocompetence and sperm performance in male mallards

    Anne Peters;Angelika Denk;Kaspar Delhey;Bart Kempenaers

  • Plumage colour in nestling blue tits: sexual dichromatism, condition dependence and genetic effects

    Arild Johnsen;Kaspar Delhey;Staffan Andersson;Bart Kempenaers

  • Paternity analysis reveals opposing selection pressures on crown coloration in the blue tit (Parus caeruleus)

    Kaspar Delhey;Arild Johnsen;Anne Peters;Staffan Andersson

  • A review of Gloger's rule, an ecogeographical rule of colour: definitions, interpretations and evidence.

    Kaspar Delhey

  • Trade-offs between immune investment and sexual signaling in male mallards.

    Anne Peters;Kaspar Delhey;Angelika G. Denk;Bart Kempenaers

  • Seasonal changes in blue tit crown color: Do they signal individual quality?

    Kaspar Delhey;Anne Peters;Arild Johnsen;Bart Kempenaers

  • Male sexual attractiveness and parental effort in blue tits: A test of the differential allocation hypothesis

    Arild Johnsen;Kaspar Delhey;Emmi Schlicht;Anne Peters

  • Cosmetic coloration in birds : Occurrence, function, and evolution

    Kaspar Delhey;Anne Peters;Bart Kempenaers

  • Immunosenescence in wild animals: meta-analysis and outlook.

    Anne Peters;Kaspar Delhey;Shinichi Nakagawa;Anne E. Aulsebrook;Anne E. Aulsebrook

  • The Effect of Migratory Shorebirds on the Benthic Species of Three Southwestern Atlantic Argentinean Estuaries

    Florencia Botto;Oscar O. Iribarne;Mariano M. Martínez;Kaspar Delhey

  • The condition-dependent development of carotenoid-based and structural plumage in nestling blue tits: males and females differ

    Anne Peters;Kaspar Delhey;Arild Johnsen;Bart Kempenaers

  • Conservation status of the buff-breasted sandpiper: historic and contemporary distribution and abundance in south america

    Richard B. Lanctot;Daniel E. Blanco;Rafael A. Dias;Juan P. Isacch

  • Reconciling ecogeographical rules: rainfall and temperature predict global colour variation in the largest bird radiation

    Kaspar Delhey;James Dale;Mihai Valcu;Bart Kempenaers

  • Condition‐dependence of multiple carotenoid‐based plumage traits: an experimental study

    Anne Peters;Kaspar Delhey;Staffan Andersson;Hendrika J. van Noordwijk

  • Darker where cold and wet: Australian birds follow their own version of Gloger's rule

    Kaspar Delhey

  • Age differences in blue tit Parus caeruleus plumage colour: within-individual changes or colour-biased survival?

    Kaspar Delhey;Bart Kempenaers

  • Conservation implications of anthropogenic impacts on visual communication and camouflage.

    Kaspar Delhey;Anne Peters

  • Seasonal Changes in Colour: A Comparison of Structural, Melanin- and Carotenoid-Based Plumage Colours

    Kaspar Delhey;Claudia Burger;Wolfgang Fiedler;Anne Peters

  • Fertilization success and UV ornamentation in blue tits Cyanistes caeruleus: correlational and experimental evidence

    Kaspar Delhey;Anne Peters;Arild Johnsen;Bart Kempenaers

  • Gloger’s rule

    Kaspar Delhey

  • Quantifying Variability of Avian Colours: Are Signalling Traits More Variable?

    Kaspar Delhey;Anne Peters

Frequent Co-Authors

Anne Peters
Anne Peters Monash University
Bart Kempenaers
Bart Kempenaers Max Planck Institute for Ornithology
Michelle L. Hall
Michelle L. Hall University of Melbourne
Mihai Valcu
Mihai Valcu Max Planck Society
Arild Johnsen
Arild Johnsen University of Oslo
Staffan Andersson
Staffan Andersson University of Gothenburg
Oscar Iribarne
Oscar Iribarne National University of Mar del Plata
Knud A. Jønsson
Knud A. Jønsson Swedish Museum of Natural History
Anne Peters
Anne Peters Max Planck Institute for Comparative Public Law and International Law
Naomi E. Langmore
Naomi E. Langmore Australian National University

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Related Online Degrees & Career Pathways

For students interested in Animal Science and Veterinary fields, exploring related online degrees can open diverse career opportunities. Programs like online exercise science programs equip graduates with knowledge of biomechanics and animal physiology, useful in roles such as animal rehabilitation and performance training.

Certification is critical in specialized careers, and pursuing bcaba accredited programs offers pathways into behavior analysis. This is especially relevant for working with animals exhibiting behavioral disorders, enhancing professional credibility and client trust.

Another interdisciplinary option is psychology-focused degrees. Careers involving animal-assisted therapy benefit from understanding human behavior, which can be approached through nasp approved online school psychology programs. These programs prepare students to support emotional and educational development, integrating human-animal interactions.

For advanced professional practice, students may consider online psyd programs accredited by apa. These doctoral-level degrees emphasize clinical psychology skills that complement therapeutic work involving animals, fostering holistic health approaches.

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