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Cited by 10Morphological variations and asymmetryComparative Animal Anatomy StudiesAvian ecology and behavior

Analysis of skull morphometric characters in diurnal raptors (Accipitriformes and Falconiformes)

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Pecsics, Tibor, Laczi, Miklós, Nagy, Gergely, Kondor, Tamás, Csörgő, Tibor·2019·Ornis Hungarica
DOI 10.2478/orhu-2019-0008
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Abstract

Diurnal birds of prey (Accipitriformes and Falconiformes) has traditionally been known as comprising a single order. Recently, this classification has been used in the non-taxonomic sense as referring to a convergent group of birds that are largely classified as predatory birds. Although these birds are similar in their morphology, the species differ in their foraging methods and prey preference. The cranial shape and the physical attributes determine the efficiency of the resource use. The aim of this study is to increase our knowledge of the relationship between skull shape, prey preference, and foraging habits. A geometric morphometric approach was used to analyse two-dimensional cranial landmarks. We used principal component (PC) analyses on measurements that may be related to prey preference and foraging habits. The PCs are resulted described the relative height of the skull and beak, the variation in the relative size, the orientation and robustness of the lacrimal bone, the variation in the relative size of the neurocranium compared to the viscerocranium , and the orientation of the palatine bone. The dietary categories significantly overlap. The skull morphology reflects more on foraging habits than diet or prey preference.

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  • Ornithologists have struggled to resolve relationships within Accipitridae because of high levels of apparent convergence, in external morphology and skeletal structure, likely caused by shared selective pressures that stem inherently from a predatory lifestyle.

    “Despite this considerable diversity, ornithologists have struggled to resolve relationships within Accipitridae because of high levels of apparent convergence, in external morphology and skeletal structure, likely caused by shared selective pressures that stem inherently from a predatory lifestyle (Holdaway, 1994;Pecsics et al., 2019).”

    From Enigmas no longer: using ultraconserved elements to place several unusual hawk taxa and address the non-monophyly of the genus <i>Accipiter</i> (Accipitriformes: Accipitridae) (2025) · cites this paper as Pecsics et al., 2019

    The Introduction (p. 2) describes uncertain relationships among higher raptor taxa and calls diurnal birds of prey a convergent group. The Discussion (p. 10) links similar skull traits in hawk- and eagle-like species from different subfamilies to convergent evolution and similar ecological demands. It does not specifically say that ornithologists have struggled to resolve relationships within Accipitridae because of convergence in both external morphology and skeletal structure. (LLM, conf=0.85)

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Authors
Pecsics, T., Laczi, M., Nagy, G., Kondor, T., & Csörgő, T.
Affiliations
Eötvös Loránd University (HU)
ORCID
Venue
Ornis Hungarica
Publisher
Walter de Gruyter GmbH
Published
2019-06-01
Volume
27
Issue
1
Pages
117-131
ISSN
  • 1215-1610 (ISSN-L)
  • 2061-9588
DOI
10.2478/orhu-2019-0008
OpenAlex
W2965532552
Cited by
10
References
1
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 3
FWCI
1.96
Type
journal article
Language
en
Open access
Licence
Locations
  • Ornis Hungarica (publishedVersion, cc-by-nc-nd)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • ELTE Digital Institutional Repository (EDIT) (Eötvös Loránd University) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Mathematics › Geometry and Topology › Morphological variations and asymmetry
  • Health Sciences › Medicine › Urology › Comparative Animal Anatomy Studies
  • Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
Keywords
diurnal raptors, Accipitriformes, Falconiformes, skull morphology, head shape, prey selection, geometric morphometrics, lacrimal bone, neurocranium, viscerocranium, palatine

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