Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
306
datasets available to search
ShareScore release 0.9.0
Dataset results
306 results for “Birds (Aves)”
Figure 4 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)
Figure 4. Graph of stage (Hamburger & Hamilton, 1951) of first occurrence of ossification for fore- and hindlimb elements for chicken, turkey, emu and rhea embryos. The order in which the elements are presented is standardized against the chicken sequence. Stage 40.5 is the same as stage 40+ in the text, whereas stage 45 represents elements that are ossified in the adult but unossified in the oldest embryo examined. The digit number is in roman numerals; the phalanges are numbered proximally to distally in arabic numerals.
Figure 2 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)
Figure 2. Lateral view of the hindlimb and pelvic girdle of palaeognath embryos. A–C, Dromaius novaehollandiae: A, stage 32 (RM 8052); B, stage 36 (day 25 of incubation, RM 8023); C, stage 40+ (day 36 of incubation, RM 8034). E–G, Struthio camelus: E, day 15 of incubation (YPM 112437); F, day 21 of incubation (YPM 112444); G, day 34 of incubation (YPM 112459). I, J, Eudromia elegans: I, day 10 of incubation (YPM 112520); J, day 15 of incubation (YPM 112525). D, H, Rhea americana: D, stage 34 (day 14 of incubation, RM 7217); H, stage 40+ (day 26 of incubation, RM 7223). Grey shaded regions represent cartilage; black regions represent ossified tissue. The density of stippling reflects the relative degree of ossification. Scale bar, 5 mm.
Figure 3 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)
Figure 3. Comparable developmental stages of Meleagris gallopavo (A), Rhea americana (B) and Dromaius novaehollandiae (C). Each embryo is at stage 34 (Hamburger & Hamilton, 1951) and to the same scale. Arrows mark the proximal and distal extents of the developing wings. Scale bar, 1 cm.
Figure 6 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 6. Character supporting the monophyly of quails – secondary fossa pneumaticum on proximal end of humerus well developed (character 56). Caudal views of humeri: A, Crax globulosa; B, Numida meleagris; C, Meleagris gallopavo; D, Phasianus colchicus; E, Colinus virginianus. Not to scale – this figure reproduced from Holman (1964: Plate 2) with permission of the Florida Academy of Sciences. Abbreviations: pn, fossa pneumaticum; spn, second well-developed fossa pneumaticum.
Figure 5 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 5. One of the characters supporting the monophyly of the phasianoid Galliformes – processus craniolateralis angled at 45∞ with respect to carina sternum (character 51): A, sternum of Aburria pipile (Cracidae) in left lateral view; B, sternum of Lagopus lagopus (Tetraonidae) in left lateral view. Abbreviation: pc, processus craniolateralis (figure not to scale).
Figure 4 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 4. Some characters supporting the monophyly of Galliformes with respect to Anseriformes (Figs 2, 3). Incisurae laterales of sternum (character 48): A, sternum of Aburria pipile (Galliformes, Cracidae) in ventral view; B, sternum of Cairina moschata (Anseriformes, Anatidae) in ventral views; incisura capitis of proximal humerus enclosed from crus dorsale fossa by a distinct ridge (character 61): C, left humerus of Aburria pipile (Galliformes, Cracidae) in caudal view; D, left humerus of Chauna chavaria (Anseriformes, Anhimidae) in caudal view; trochlea metatarsal III distinctly asymmetric (character 83): E, right tarsometatarsus of Lagopus mutus (Galliformes, Tetraonidae) in dorsal view; F, right tarsometatarsus of Chauna torquata (Anseriformes, Anhimidae) in dorsal view. Abbreviations: il, incisura laterale; r, ridge between incisura capitis and crus dorsale fossae of proximal humerus (caudal view); tr. mt. III, trochlea metatarsalia III (figure not to scale).
Figure 2 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 2. One of the 1700 MPTs (612 steps in length; CI = 0.179) recovered by parsimony analysis of the complete data-set for Galliformes (Appendix 2). Characters having a consistency index of 1 in this tree are given across internal nodes (see text for details); filled circle denotes Galliformes. Taxa of Anseriformes used as outgroups are in bold; bootstrap support values for important nodes are given in bold.
Figure 3 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 3. Strict consensus representation of 1700 MPTs recovered by parsimony analysis of the complete data-set for Galliformes (Appendix 2). Taxa of Anseriformes used as outgroups are in bold.
Figure 1 in Suprageneric relationships of galliform birds (Aves, Galliformes): a cladistic analysis of morphological characters
Figure 1. Two previous hypotheses for the internal relationships of Galliformes: A, Sibley & Ahlquist (1990: fig. 357). B, Johnsgard (1986: fig. 3; reproduced with permission, Oxford University Press).
Figure 9 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 9. Scleral ring measurements of Jeholornis STM 3-8. Reassembled three-dimensional cranial model of Jeholornis STM 3-8 used for measurements, following Hu et al. (2022). Scale bar: 5 mm. Abbreviations: EXT, scleral ring outer diameter; INT, scleral ring inner diameter; OL, orbital length.
Figure 8 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 8. Three-dimensional snapshots of mandibular elements of Jeholornis STM 3-8: lateral (A) and medial (B) views of the left mandible; lateral (C), medial (D) and dorsal (E) views of the left dentary; medial view of the left dentary with maxillary teeth (F); lateral (G), medial (H) and dorsal (I) views of the left surangular; lateral (J) and medial (K) views of the right splenial; lateral (L) and medial (M) views of the angular. Scale bar: 5 mm. Arrows indicate the rostral direction. Abbreviations: cnp, coronoid process; dt, dentary teeth; lct, lateral condyle; mct, medial condyle; mf, mandibular fenestra; mfs, mandibular fossa; mp, medial process; mt, maxillary teeth; pra, prearticular; rcd, rostral concavity of dentary; rt, replacement tooth; rtp, retroarticular process.
Figure 7 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 7. Photograph and reidentified cranial elements of Jeholornis palmapenis. Scale bar: 5 mm. Revised from O'Connor et al. (2012). Abbreviations: pt, palatine; qj, quadratojugal.
Figure 6 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 6. Comparisons of postorbital and palatal complex in Aves. Taxa without the postorbital present indicate that this element has been entirely reduced and fused to the frontal to be the postorbital process in these taxa. Dashed lines indicate uncertain structures. Scale bar: 5 mm only for the postorbitals.
Figure 5 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 5. Three-dimensional snapshots of the palatal elements and scleral ring of Jeholornis STM 3-8: ventral (A) and dorsal (B) views of the vomer; medial (C) and lateral (D) views of the right pterygoid; ventral (E) and dorsal (F) views of the right palatine; left view of the scleral ring (G) and the scleral bone (H). Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Abbreviations: a.m, maxilla articulation; a.pa, palatine articulation; a.psr, parasphenoid rostrum articulation; a.pt, pterygoid articulation; a.v, vomer articulation; cp, choanal process; mpa, maxillary process of palatine; op, overplate; par, palatine ramus of pterygoid; pgw, pterygoid wing; pj, jugal process of palatine; pmr, premaxillary ramus of vomer; ptr, pterygoid ramus of vomer; qur, quadrate ramus of pterygoid.
Figure 4 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 4. Three-dimensional snapshots of the quadrate and skull roof of Jeholornis STM 3-8: lateral (A), medial (B) and caudal (C) views of the right quadrate; dorsal (D) and ventral (E) views of the frontals; dorsal (F), ventral (G) and caudal (H) views of the braincase. Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Dashed lines indicate broken margins. Abbreviations: a.n, nasal articulation; a.pa, parietal articulation; bsr, basisphenoid recess; cup, cultriform process; lc, lateral condyle of quadrate; mc, medial condyle of quadrate; nc, nuchal crest; oc, occipital condyle; op, orbital process of quadrate; om, obital margin; otp, otic process of quadrate; prp, paroccipital process; sr, supraorbital rim; stf, supratemporal fossa. Labels of neurocranial elements are not abbreviated.
Figure 3 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 3. Three-dimensional snapshots of lateral and dorsal cranial elements of Jeholornis STM 3-8: dorsal lateral (A) and ventromedial (B) views of the left nasal; dorsal views of the right (C) and left (D) preorbital ossification; lateral (E) and medial (F) views of the left quadratojugal; lateral (G) and medial (H) views of the left jugal; lateral (I), laterocaudal (J) and medial (K) views of the left postorbital; lateral (L) and medial (M) views of the right squamosal. Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Dashed lines indicate broken margins. Abbreviations: a.m, maxilla articulation; a.po, postorbital articulation; a.q, quadrate articulation; a.qj, quadratojugal articulation; a.s, squamosal articulation; fpo, frontal process of postorbital; jpo, jugal process of postorbital; jpq, jugal process of quadratojugal; mpj, maxillary process of jugal; mpn, maxillary process of nasal; ocj, oval concavity of jugal; poj, postorbital process of jugal; pos, postorbital process of squamosal; ppn, premaxillary process of nasal; qjp, quadratojugal process of jugal; qjs, quadratojugal process of squamosal; spo, squamosal process of postorbital; spq, squamosal process of quadratojugal.
Figure 2 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 2. Three-dimensional snapshots of rostral cranial elements of Jeholornis STM 3-8: lateral (A) and medial (B) views of the articulated left premaxilla, maxilla and lacrimal; lateral view (C), lateral line drawing (D), dorsal view (E) and ventral view (F) of the fused premaxillae; lateral (G), caudolateral (H) and medial (I) views of the right lacrimal; lateral view (J), lateral line drawing (K) and medial view (L) of the left maxilla. Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Abbreviations: a.j, jugal articulation; a.l, lacrimal articulation; a.m, maxilla articulation; a.n, nasal articulation; aof, antorbital fenestra; a.p, premaxilla articulation; a.pt, palatine articulation; apm, ascending process of maxilla; cdr; caudodorsal ramus of lacrimal; fpp, frontal process of premaxilla; jpm, jugal process of maxilla; ld, lateral depression of maxilla to receive the maxillary process of premaxilla; lf, lacrimal foramen; mf?, potential maxillary fenestra; mpp, maxillary process of premaxilla; mt, maxillary teeth; nf, nutrient foramina; pam, palatal process of maxilla; ppm, premaxillary process of maxilla; ppp, palatal process of premaxilla; rdr, rostrodorsal ramus of lacrimal; vr, ventral ramus of lacrimal.
Figure 1 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)
Figure 1. Photograph (A), left view of the three-dimensionally reconstructed skull (B) and lateral (C) and ventral (D) views of the two-dimensional cranial reconstruction of Jeholornis STM 3-8 (following Hu et al., 2022). Scale bars: 5 mm. Abbreviations: an, angular; br, braincase; de, dentary; ep, ectopterygoid; fr, frontal; ju, jugal; la, lacrimal; ma, maxilla; na, nasal; pa, palatine; pre, premaxilla; po, postorbital; pro, preorbital ossification; pt, pterygoid; qj, quadratojugal; qu, quadrate; sp, splenial; sq, squamosal; sr, scleral ring; su, suangular; v, vomer. Dashed lines indicate the elements not preserved but suspected to exist.
Рис. 1. Основная точка сбора материаΛа, окрестности Ростова-на-Αону. Fig. 1. Location of study area in Rostov-on-Don vicinity. in To the fauna of chewing lice (Insecta: Phthiraptera) of birds (Aves: Falconiformes, Strigiformes) in the Lower Don region, Russia
Рис. 1. Основная точка сбора материаΛа, окрестности Ростова-на-Αону. Fig. 1. Location of study area in Rostov-on-Don vicinity.
Ecological traits drive genetic structuring in two open-habitat birds from the morphologically cryptic genus Elaenia (Aves: Tyrannidae)
<p>Understanding the relative contributions of the many factors that shape population genetic structuring is a central theme in evolutionary and conservation biology. Historically, abiotic or extrinsic factors (such as geographic barriers or climatic shifts) have received greater attention than biotic or intrinsic factors (such as dispersal or migration). This focus stems in part from the logistical difficulties in taking a comparative phylogeographic approach that contrasts species that have experienced similar abiotic conditions during their evolution yet differ in the intrinsic attributes that might shape their genetic structure. To explore the effects of intratropical migration on the genetic structuring of Neotropical birds, we chose two congeneric species, the Lesser Elaenia (<em>Elaenia chiriquensis</em>) and the Plain-crested Elaenia (<em>E. cristata</em>), that are largely sympatric, and which have similar plumage, habitat preferences, and breeding phenology. Despite these many commonalities, they differ in migratory behavior: <em>E. chiriquensis</em> is an intratropical migratory species while <em>E. cristata</em> is sedentary. We used a reduced representation genomic approach to test whether migratory behavior is associated with increased gene flow and therefore lower genetic population structure. As predicted, we found notably stronger genetic structuring in the sedentary species than in the migratory ones. <em>E. cristata</em> comprises genetic clusters with geographic correspondence throughout its distribution, while there are no geographic groups within Brazil for <em>E. chiriquensis</em>. This comparison adds to the growing evidence about how intrinsic traits like migration can shape the genetic structuring of birds, and advances our understanding of the diversification patterns of the understudied, open habitat species from South America.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.