Reproduction data for specialist and generalist raptors breeding in Norway

Version 1.1

Halgunset, Eirik Sandvik, 2025, "Reproduction data for specialist and generalist raptors breeding in Norway", https://doi.org/10.18710/NJEDNQ, DataverseNO, V1

Learn about Data Citation Standards.

Contact Owner

Dataset Metrics

13 Downloads

Description	This dataset contains reproduction data for 25 raptors regularly breeding in Norway. Additionally, reproduction data for the Long-tailed skua and 4 common corvid species breeding in Norway are included. Data includes clutch size means, standard deviation of the clutch, fledglings per clutch, proportion fledged per clutch, clutch size range, breeding habitat and latitude. All species are categorized as either a generalist, specialist or corvid. Literature was used to categorize the species and are linked to in the dataset. The data was collected from literature and combined into a dataset. All species have reproduction data, and the individual references are linked to the dataset. The mean clutch size, standard deviation and number of fledglings were collected from different references while the clutch size range was mainly collected from the website Birds of the World. The literature used in this study was selected based on three criteria: 1) The mean clutch size, number of fledglings and proportion fledged per clutch were measured during several years (minimum 2 years). 2) The data had many observations, and if several references for one species were available, the reference with the most observations was chosen. 3) If criteria 2 and 3 were achieved, data from studies conducted in the arctic tundra or boreal forest in Fennoscandia was preferred. Google Scholar was used to find the references with the following search words: species name, clutch size, reproduction, arctic tundra, boreal forest (2025-7-28)
Subject	Earth and Environmental Sciences
Keyword	Biology, Reproduction traits, Birds of prey, Hawks, Eagles, Falcons, Owls, Corvids, Boreal, Tundra, Arctic, Specialist, Generalist, Raptor, Ecology
License/Data Use Agreement	CC0 1.0

Filter by

	1 to 4 of 4 Files	Download
	00_ReadMe.txt Plain Text - 5.0 KB Published Nov 11, 2025 4 Downloads MD5: f66935f613814caf78e978f3c0695704	Preview "00_ReadMe.txt" Access File File Access Public Download Options Plain Text Download Metadata Data File Citation Download EndNote XML Download RIS Download BibTeX
	category_reference.txt Plain Text - 4.7 KB Published Nov 11, 2025 3 Downloads MD5: 6bb48f3b964fa3c7cbbb412a3908672f	Preview "category_reference.txt" Access File File Access Public Download Options Plain Text Download Metadata Data File Citation Download EndNote XML Download RIS Download BibTeX
	reproduction_data_raptors.csv Comma Separated Values - 5.4 KB Published Nov 11, 2025 3 Downloads MD5: 2f6b6b0dbbc106f96fd6c65b2b60f55d	Preview "reproduction_data_raptors.csv" Access File File Access Public Download Options Comma Separated Values Download Metadata Data File Citation Download EndNote XML Download RIS Download BibTeX
	reproduction_data_reference.txt Plain Text - 5.7 KB Published Nov 11, 2025 3 Downloads MD5: 8794b3a15f087b021048b8ab1492d0f8	Preview "reproduction_data_reference.txt" Access File File Access Public Download Options Plain Text Download Metadata Data File Citation Download EndNote XML Download RIS Download BibTeX

Citation Metadata

Persistent Identifier	doi:10.18710/NJEDNQ
Publication Date	2025-11-11
Title	Reproduction data for specialist and generalist raptors breeding in Norway
Author	https://ror.org/00wge5k78https://orcid.org/0009-0003-8908-7818
Point of Contact	Use email button above to contact. Mellard, Jarad (UiT The Arctic University of Norway)
Description	This dataset contains reproduction data for 25 raptors regularly breeding in Norway. Additionally, reproduction data for the Long-tailed skua and 4 common corvid species breeding in Norway are included. Data includes clutch size means, standard deviation of the clutch, fledglings per clutch, proportion fledged per clutch, clutch size range, breeding habitat and latitude. All species are categorized as either a generalist, specialist or corvid. Literature was used to categorize the species and are linked to in the dataset. The data was collected from literature and combined into a dataset. All species have reproduction data, and the individual references are linked to the dataset. The mean clutch size, standard deviation and number of fledglings were collected from different references while the clutch size range was mainly collected from the website Birds of the World. The literature used in this study was selected based on three criteria: 1) The mean clutch size, number of fledglings and proportion fledged per clutch were measured during several years (minimum 2 years). 2) The data had many observations, and if several references for one species were available, the reference with the most observations was chosen. 3) If criteria 2 and 3 were achieved, data from studies conducted in the arctic tundra or boreal forest in Fennoscandia was preferred. Google Scholar was used to find the references with the following search words: species name, clutch size, reproduction, arctic tundra, boreal forest (2025-7-28)
Subject	Earth and Environmental Sciences
Keyword	Biology Reproduction traits Birds of prey Hawks Eagles Falcons Owls Corvids Boreal Tundra Arctic Specialist Generalist Raptor Ecology
Language	English
Producer	UiT The Arctic University of Norway (UiT) https://en.uit.no/
Contributor	Supervisor: Mellard, Jarad
Distributor	UiT The Arctic University of Norway (UiT) https://dataverse.no/dataverse/uit
Depositor	Halgunset, Eirik Sandvik
Deposit Date	2025-05-08
Date of Collection	Start Date: 2025-01-01; End Date: 2025-05-01
Data Type	Litterature data; Observation data
Data Source	Bertolino, S., Ghiberti, E., & Perrone, A. (2001). Feeding ecology of the long-eared owl (Asio otus) in northern Italy: is it a dietary specialist? Canadian Journal of Zoology, 79(12), 2192-2198. https://doi.org/10.1139/z01-182 ; Dvořák, B. T. (2024). Diet specialization of the Eurasian Sparrowhawk Accipiter nisus in Pošumaví [Master's thesis, University of South Bohemia in České Budějovice]. https://theses.cz/id/aqtqnr/ ; Fargallo, J. A., Martinez-Padilla, J., Vinuela, J., Blanco, G., Torre, I., Vergara, P., & De Neve, L. (2009). Kestrel-prey dynamic in a Mediterranean region: the effect of generalist predation and climatic factors. PLoS One, 4(2). https://doi.org/10.1371/journal.pone.0004311 ; Grønsdal, E. (2012). Prey handling by a generalist predator, the Golden Eagle (Aquila chrysaetos) [Master`s thesis, Norwegian University of Life Sciences, Ås]. http://hdl.handle.net/11250/187103 ; Hanski, I., Hansson, L., & Henttonen, H. (1991). Specialist predators, generalist predators, and the microtine rodent cycle. The Journal of Animal Ecology, 60(1), 353-367. https://doi.org/10.2307/5465 ; Henttonen, H., Hansson, L., & Saitoh, T. (1992). Rodent dynamics and community structure: Clethrionomys rufocanus in northern Fennoscandia and Hokkaido. Annales Zoologici Fennici, 29(1), 1-6. http://www.jstor.org/stable/23735338 ; Ivarsen, A. E. (2019). Prey handling and in a generalist and specialist raptor: the Eurasian kestrel (Falco tinnunculus), and the Peregrine falcon (Falco Peregrinus) [Master's thesis, University of Oslo]. http://urn.nb.no/URN:NBN:no-71494 ; Kajtoch, Ł. (2025). The Ural Owl as a Keystone Species in Interspecific Interactions Among Avian Predators—A Review. Diversity, 17(2). https://doi.org/10.3390/d17020109 ; Kajtoch, Ł. (2025). The Ural Owl as a Keystone Species in Interspecific Interactions Among Avian Predators—A Review. Diversity, 17(2). https://doi.org/10.3390/d17020109 ; Kropacheva, Y. E., Smirnov, N. G., Zykov, S. V., Cheprakov, M. I., Sadykova, N. O., & Bachurin, G. N. (2019). The Diet of the Great Gray Owl, Strix nebulosa, at Different Levels of Prey Abundance during the Nesting Season. Russian Journal of Ecology, 50(1), 43-49. https://doi.org/10.1134/S1067413619010041 ; Lien, T. F. (2017). Video monitoring of ospreys (Pandion haliaetus) at the nest: prey deliveries, feeding time and potential family conflicts [Master`s thesis, Norwegian University of Life Sciences, Ås]. http://hdl.handle.net/11250/2564965 ; Nadjafzadeh, M., Voigt, C. C., & Krone, O. (2016). Spatial, seasonal and individual variation in the diet of White-tailed Eagles Haliaeetus albicilla assessed using stable isotope ratios. Ibis, 158(1), 1-15. https://doi.org/10.1111/ibi.12311 ; Nyhammer, V. (2016). Prey choice, prey deliveries and prey handling in a generalist predator: video monitoring at a nest of the eagle owl (Bubo bubo) [Master`s thesis, Norwegian University of Life Sciences, Ås]. http://hdl.handle.net/11250/2397224 ; O’Donoghue, B. G. (2010). The ecology and conservation of Hen Harriers (Circus cyaneus) in Ireland [Doctoral dissertation, National University of Ireland]. ; Popescu, S. M., Tigae, C., Dobrițescu, A., & Ștefănescu, D. M. (2024). Exploring the Climatic Niche Evolution of the Genus Falco (Aves: Falconidae) in Europe. Biology, 13(2). https://doi.org/10.3390/biology13020113 ; Rajkovic, D. Z. (2018). Diet composition and prey diversity of Tengmalm's owl Aegolius funereus (Linnaeus, 1758; Aves: Strigidae) in central Serbia during breeding. Turkish Journal of Zoology, 42(3), 346-351. https://doi.org/10.3906/zoo-1709-28 ; Roberson, A. M., Andersen, D. E., & Kennedy, P. L. (2003). The northern goshawk (Accipiter gentilis atricapillus) in the western Great Lakes Region: a technical conservation assessment. (Minnesota Cooperative Fish & Wildlife Research Unit). https://hdl.handle.net/11299/183582 ; Rohner, C., Smith, J. N. M., Stroman, J., Joyce, M., Doyle, F. I., & Boonstra, R. (1995). Northern Hawk-Owls in the Nearctic Boreal Forest: Prey Selection and Population Consequences of Multiple Prey Cycles. The Condor: Ornithological Applications, 97(1), 208-220. https://doi.org/10.2307/1368997 ; Sodhi, N. S. (1992). Central Place Foraging and Prey Preparation by a Specialist Predator, the Merlin (Forrajeo de un Punto Central y Preparación de la Presa por un Depredador Especializado: Falco columbarius). Journal of Field Ornithology, 63(1), 71-76. http://www.jstor.org/stable/4513664 ; Solheim, R. (1984). Breeding biology of the Pygmy Owl Glaucidium passerinum in two biogeographical zones in southeastern Norway. Annales Zoologici Fennici, 21(3), 295-300. http://www.jstor.org/stable/23734161 ; Solonen, T., Karhunen, J., Kekkonen, J., Kolunen, H., & Pietiäinen, H. (2017). Diet and reproduction in coastal and inland populations of the Tawny Owl Strix aluco in southern Finland. Journal of Ornithology, 158(2), 541-548. https://doi.org/10.1007/s10336-016-1405-8 ; Antonov, A., & Atanasova, D. (2003). Small-scale differences in the breeding ecology of urban and rural Magpies Pica pica. Ornis fennica, 80(1), 21–30. https://ornisfennica.journal.fi/article/view/133588 ; Beecham, J. J., & Kochert, M. N. (1975). Breeding Biology of the Golden Eagle in Southwestern Idaho. The Wilson Bulletin, 87(4), 506-513. http://www.jstor.org/stable/4160686 ; Bogliani, G., Barbieri, F., & Tiso, E. (1994). Nest-site selection by the Hobby (Falco subbuteo) in poplar plantations in northern Italy. Journal of Raptor Research, 28(1), Article 4. https://digitalcommons.usf.edu/jrr/vol28/iss1/4 ; Falk, K., & Møller, S. (1990). Clutch Size Effects on Eggshell Thickness in the Peregrine Falcon and European Kestrel. Ornis Scandinavica (Scandinavian Journal of Ornithology), 21(4), 265-269. https://doi.org/10.2307/3676390 ; Goszczyński, J. (2001). The Breeding Performance of the Common Buzzard Buteo buteo and Goshawk Accipiter gentilis in Central Poland. Acta Ornithologica, 36(2), 105-110. https://doi.org/10.3161/068.036.0202 ; Hadad, E., Charter, M., Ovadia, O., & Shochat, E. (2023). The interplay among breeding timing, brood size, food quantity, and nestling growth rate in the Eurasian eagle owl (Bubo bubo). Biological Journal of the Linnean Society, 141(2), 255-263. https://doi.org/10.1093/biolinnean/blad074 ; Helander, B. (1985). Reproduction of the white-tailed sea eagle Haliaeetus albicilla in Sweden. Ecography, 8(3), 211-227. https://doi.org/https://doi.org/10.1111/j.1600-0587.1985.tb01172.x ; Hildén, O., & Helo, P. (1981). The great grey owl Strix nebulosa-a bird of the northern taiga. Ornis fennica, 58(4), 159-166. ; Kasprzykowski, Z. (2008). Nest location within the tree and breeding parameters of Rooks Corvus frugilegus. Bird study, 55(1), 59-65. https://doi.org/10.1080/00063650809461505 ; Korpimäki, E. (1984). Population dynamics of birds of prey in relation to fluctuations in small mammal populations in western Finland. Annales Zoologici Fennici, 21(3), 287-293. http://www.jstor.org/stable/23734160 ; Korpimäki, E. (1987). Clutch Size, Breeding Success and Brood Size Experiments in Tengmalm's Owl Aegolius funereus: A Test of Hypotheses. Ornis Scandinavica (Scandinavian Journal of Ornithology), 18(4), 277-284. https://doi.org/10.2307/3676896 ; Maher, W. J. (1974). Ecology of pomarine, parasitic, and long-tailed jaegers in northern Alaska. Pacific Coast Avifauna, 34. https://digitalcommons.usf.edu/pca/34 ; Menyushina, I. E. (1997). Snowy Owl (Nyctea scandiaca) reproduction in relation to lemming population cycles on Wrangel Island. In J. R. Duncan, D. H. Johnson, & T. H. Nicholls (Eds.), Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: US Dept. of Agriculture, Forest Service, North Central Forest Experiment Station (pp. 572-582). https://research.fs.usda.gov/treesearch/15637 ; Mikkola, H. (1972). Hawk Owls and their prey in northern Europe. British Birds, 65, 453-460. ; Mossop, D. H., & Barichello, N. (2011). The overwhelming influence of ptarmigan abundance on gyrfalcon reproductive success in the central Yukon, Canada. In R. T. Watson, T. J. Cade, M. Fuller, G. Hunt, & E. Potapov (Eds.), Gyrfalcons and Ptarmigan in a Changing World (Vol. 1, pp. 307-322). https://doi.org/10.4080/gpcw.2011.0205 ; Nielsen, J. T., & Møller, A. P. (2006). Effects of food abundance, density and climate change on reproduction in the sparrowhawk Accipiter nisus. Oecologia, 149(3), 505-518. https://doi.org/10.1007/s00442-006-0451-y ; Odsjö, T., & Sondell, J. (1976). Reproductive Success in Ospreys Pandion haliaetus in Southern and Central Sweden, 1971-1973. Ornis Scandinavica (Scandinavian Journal of Ornithology), 7(1), 71-84. https://doi.org/10.2307/3676176 ; Pietiäinen, H., Saurola, P., & Väisänen, R. A. (1986). Parental Investment in Clutch Size and Egg Size in the Ural Owl Strix uralensis. Ornis Scandinavica (Scandinavian Journal of Ornithology), 17(4), 309-325. https://doi.org/10.2307/3676819 ; Potapov, E. R. (1997). What Determines the Population Density and Reproductive Success of Rough-Legged Buzzards, Buteo lagopus, in the Siberian Tundra? Oikos, 78(2), 362-376. https://doi.org/10.2307/3546304 ; Redpath, S. M., Arroyo, B. E., Etheridge, B., Leckie, F., Bouwman, K., & Thirgood, S. J. (2002). Temperature and hen harrier productivity: from local mechanisms to geographical patterns. Ecography, 25(5), 533-540. https://doi.org/10.1034/j.1600-0587.2002.250503.x ; Roberts, S. J., & Law, C. (2014). Honey-buzzards in Britain. British Birds, 107, 668-691. ; Rofstad, G., & Sandvik, J. (1985). Variation in Egg Size of the Hooded Crow Corvus corone cornix. Ornis Scandinavica (Scandinavian Journal of Ornithology), 16(1), 38-44. https://doi.org/10.2307/3676573 ; Rofstad, G., & Sandvik, J. (1985). Variation in Egg Size of the Hooded Crow Corvus corone cornix. Ornis Scandinavica (Scandinavian Journal of Ornithology), 16(1), 38-44. https://doi.org/10.2307/3676573 ; Stiehl, R. B. (1985). Brood Chronology of the Common Raven. The Wilson Bulletin, 97(1), 78-87. http://www.jstor.org/stable/4162040 ; Wright, P. M. (1997). Distribution, site occupancy and breeding success of the Merlin Falco columbarius on Barden Moor and Fell, North Yorkshire. Bird study, 44(2), 182-193. https://doi.org/10.1080/00063659709461054 ; Zijlstra, M., Daan, S., & Bruinenberg-Rinsma, J. (1992). Seasonal Variation in the Sex Ratio of Marsh Harrier Circus aeruginosus Broods. Functional Ecology, 6(5), 553-559. https://doi.org/10.2307/2390052

Life Sciences Metadata

Other Organism

Bubo scandiacus; Asio flammeus; Asio otus; Strix aluco; Bubo bubo; Surnia ulula; Aegolius funereus; Strix nebulosa; Strix uralensis; Glaucidium passerinum; Falco rusticolus; Falco peregrinus; Falco tinnunculus; Falco columbarius; Falco subbuteo; Astur gentilis; Circus aeruginosus; Circus cyaneus; Accipiter nisus; Buteo lagopus; Buteo buteo; Pernis apivorus; Haliaeetus albicilla; Aquila chrysaetos; Pandion haliaetus; Corvus corax; Corvus cornix; Pica pica; Corvus frugilegus; Stercorarius longicaudus

Dataset Terms

License/Data Use Agreement

Our Community Norms as well as good scientific practices expect that proper credit is given via citation. Please use the data citation shown on the dataset page.

Creative Commons CC0 1.0 Universal Public Domain Dedication. CC0 1.0

Dataset Version	Summary	Version Note	Contributors	Published on
No records found.

Edit File

This file has already been deleted (or replaced) in the current version. It may not be edited.

Restrict Access

Restricting limits access to published files. People who want to use the restricted files can request access by default. If you disable request access, you must add information about access to the Terms of Access field.

Learn about restricting files and dataset access in the User Guide.

Request Access

Enable access request

You must enable request access or add terms of access to restrict file access.

Terms of Access for Restricted Files

Save Changes

Edit Embargo

The selected file or files have already been published. Contact an administrator to change the embargo date or reason of the file or files.

Edit Retention Period

The selected file or files have already been published. Contact an administrator to change the retention period date or reason of the file or files.

Delete Files

The file will be deleted after you click on the Delete button.

Files will not be removed from previously published versions of the dataset.

Select File(s)

Please select one or more files.

Share Dataset

Share this dataset on your favorite social media networks.

Continue

Dataset Citations

Citations for this dataset are retrieved from Crossref via DataCite using Make Data Count standards. For more information about dataset metrics, please refer to the User Guide.

Sorry, no citations were found.

Inaccessible Files Selected

The selected file(s) may not be downloaded because you have not been granted access or the file(s) have a retention period that has expired or the files can only be transferred via Globus.

You may request access to any restricted file(s) by clicking the Request Access button.

Ineligible Files Selected

The selected file(s) may not be transferred because you have not been granted access or the file(s) have a retention period that has expired or the files are not Globus accessible.

You may request access to any restricted file(s) by clicking the Request Access button.

Download Options

The files selected are too large to download as a ZIP.

You can select individual files that are below the 4.7 GB download limit from the files table, or use the Data Access API for programmatic access to the files.

Select File(s)

Please select a file or files to be downloaded.

Inaccessible Files Selected

The selected file(s) may not be downloaded because you have not been granted access or the file(s) have a retention period that has expired.

Click Continue to download the files you have access to download.

Ineligible Files Selected

Some file(s) cannot be transferred. (They are restricted, embargoed, with an expired retention period, or not Globus accessible.)

Click Continue to transfer the elligible files.

Delete Dataset

Are you sure you want to delete this dataset and all of its files? You cannot undelete this dataset.

Delete Draft Version

Are you sure you want to delete this draft version? Files will be reverted to the most recently published version. You cannot undelete this draft.

Unpublished Dataset Preview URL

Preview URL can only be used with unpublished versions of datasets.

Unpublished Dataset Preview URL

Are you sure you want to disable the Preview URL? If you have shared the Preview URL with others they will no longer be able to use it to access your unpublished dataset.

Delete Files

The file(s) will be deleted after you click on the Delete button.

Files will not be removed from previously published versions of the dataset.

Compute

This dataset contains restricted files you may not compute on because you have not been granted access.

Deaccession Dataset

Are you sure you want to deaccession? This is permanent and the selected version(s) will no longer be viewable by the public.

Deaccession Dataset

Are you sure you want to deaccession this dataset? This is permanent an it will no longer be viewable by the public.

Version Differences Details

Please select two versions to view the differences.

Version Differences Details

Version:
Last Updated:

Select File(s)

Please select a file or files for access request.

Select File(s)

Embargoed files cannot be accessed. Please select an unembargoed file or files for your access request.

Edit Tags

Select existing file tags or create new tags to describe your files. Each file can have more than one tag.

Request Access

You need to Log In to request access.

Dataset Terms

Please confirm and/or complete the information needed below in order to request access to files in this dataset.

This dataset is made available under the following terms. Please confirm and/or complete the information needed below in order to continue.

License/Data Use Agreement

Our Community Norms as well as good scientific practices expect that proper credit is given via citation. Please use the data citation shown on the dataset page.

Creative Commons CC0 1.0 Universal Public Domain Dedication. CC0 1.0

Preview Guestbook

Upon downloading files the guestbook asks for the following information.

Guestbook Name

Collected Data

Account Information

Package File Download

Use the Download URL in a Wget command or a download manager to download this package file. Download via web browser is not recommended. User Guide - Downloading a Dataverse Package via URL

Download URL

https://dataverse.no/api/access/datafile/

Compute Batch

Clear Batch

Dataset	Persistent Identifier	Change Compute Batch

Compute Batch

Submit for Review

You will not be able to make changes to this dataset while it is in review.

Publish Dataset

Are you sure you want to republish this dataset?

Select if this is a minor or major version update.

Minor Release (1.2)

Major Release (2.0)

Publish Dataset

This dataset cannot be published until UiT The Arctic University of Norway is published by its administrator.

Publish Dataset

This dataset cannot be published until UiT The Arctic University of Norway and DataverseNO are published.

Return to Author

Return this dataset to contributor for modification.

Add/Edit a Version Note

Styled Citation