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56 results for “bird eggs”
FIG. 5 in Early illustrations of Aepyornis eggs (1851 - 1887): from popular science to Marco Polo's roc bird
FIG. 5. — Comparative dimensions of various bird eggs. From Capus (1885). Aepyornis egg (4) compared with eggs of an ostrich (3), a hen (2) and a hummingbird (1). Photo E. Buffetaut.
FIG. 4 in Early illustrations of Aepyornis eggs (1851 - 1887): from popular science to Marco Polo's roc bird
FIG. 4. — "The Ruc's egg". Colour lithograph, frontispiece of The Book of Ser Marco Polo, the Venetian, Concerning the Kingdoms and Marvels of the East. Volume 2 (Yule 1871). Photo E. Buffetaut.
FIG. 6 in Early illustrations of Aepyornis eggs (1851 - 1887): from popular science to Marco Polo's roc bird
FIG. 6. — "Egg of the Epiornis" [sic]. From Scientific American, March 12, 1887. Photo E. Buffetaut.
FIG. 1 in Early illustrations of Aepyornis eggs (1851 - 1887): from popular science to Marco Polo's roc bird
FIG. 1. – Egg of Aepyornis maximus Geoffroy Saint-Hilaire, 1851, from Rowley (1878). The original plate shows the egg (from Rowley's collection) at its actual size. This appears to be the first illustration of an Aepyornis egg in a scientific paper. Photo E. Buffetaut.
FIG. 3 in Early illustrations of Aepyornis eggs (1851 - 1887): from popular science to Marco Polo's roc bird
FIG. 3. — Egg of Aepiornis [sic] maximus, compared with a hen's egg. From Ward (1866). Photo E. Buffetaut.
Figure 8 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 8. Golden proportion manifested in the shape of bird eggs: 1, 13, 25, 37, ovoid profiles; 2, 14, 26, 38, ovoid profile profiles for comparison with bird eggs. Bird eggs: 3 – Alectoris chukar; 4 – Glareola pratincola; 5 – Sturnus vulgaris; 6 – Sylvia nisoria; 7 – Milvus milvus; 8 – Buteo buteo; 9 – Falco cherrug; 10 – Lanius collurio; 11 - Perdix perdix; 12 – Garrulus glandarius; 15 – Sylvia communis; 16 – Perdix perdix; 17 – Numida meleagris; 18 – Alectoris chukar; 19 – Garrulus glandarius; 20 – Coccothraustes coccothraustes; 21 – Larus melanocephalus; 22 – Dendrocopos major; 23 – Picus canus; 24 – Jynx torquilla; 27 – Luscinia svecica; 28 – Oenanthe oenanthe; 29 – Turdus merula; 30– Picus canus; 31– Aquila pomarina; 32 – Perdix perdix; 33 – Lanius collurio; 34 – Anthus trivialis; 35 – Jynx torquilla; 36– Hieraaetus pennatus; 39 – Turdus philomelos; 40 – Oriolus oriolus; 41 – Ficedula albicollis; 42 – Dendrocopos leucotos; 43 – Delichon urbica; 44 – Coccothraustes coccothraustes; 45 – Garrulus glandarius; 46 – Corvus frugilegus; 47 – Turdus merula; 48 – Gallinula chloropus.
Figure 5 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 5. Comparison of geometric standards (1, 7, 13, 19, 25, 31) with profiles of real eggs: 2 – Athene noctua; 3 – Neophron percnopterus; 4 – Merops apiaster; 5 – Phylloscopus sibilatrix; 6 – Alcedo atthis; 8 – Falco vespertinus; 9 – Aegithalos caudatus; 10 – Merops apiaster; 11 – Ficedula hypoleuca; 12 – Jynx torquilla; 14 – Sterna hirundo; 15 – Buteo buteo; 16 – Falco cherrug; 17 – Upupa epops; 18 – Dendrocopos major; 20 – Picus canus; 21 – Perdix perdix; 22 – Phasianus colchicus; 23 – Corvus monedula; 24 – Coccothraustes coccothraustes; 26 – Limosa limosa; 27 – Pica pica; 28 – Luscinia luscinia; 29 – Corvus frugilegus; 30 – Alca torda; 32 – Uria aalge; 33 – Numenius arquata; 34 – Recurvirostra avosetta; 35 – Alca torda; 36 – Corvus corax.
Figure 3 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 3. Discrete variants of combinations of the lateral arcs of the ovoid profiles (matrices): a - 0.75D; b -1.0 D; c - 1.25D; d - 1.5D; e - 1.75D.
Figure 7 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 7. Construction of ovoid profiles with golden ratio: a - construction of ovoids with doubling of radii of circles; b - construction of ovoids with increasing of radii of circles by F=1,618; c - getting golden section by a combination of four circles; d - construction of ovoids with golden section by pentagons.
Figure 11 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 11. Schematics for calculating the complementarity indices of avian eggs: 1, 2, 9, 10 - scheme and geometric profile of eggs with a complementarity index close to unity (rc=ri=(L–D)/2); 3 – Podiceps cristatus; 4 – Cygnus olor; 5 – Egretta alba; 6 – Pelecanus crispus; 7 – Egretta garzetta; 8 – Mergus serrator; 11 – Anser anser; 12 – Casuarius casuarius; 13 – Porzana parva; 14 – Phalacrocorax carbo; 15 – Podiceps nigricollis; 16 – Ardea cinerea; 17, 18 - scheme and geometric profile of eggs with a complementarity index close to 1,333 (rc=ri=lipz=L/3); 19 – Pygoscelis papua; 20 – Nyctea scandiaca; 21 – Strutio camelus; 22 – Dendrocopos minor; 23 – Alcedo atthis; 24 – Buteo chemilasius; 25 – Jynx torquilla; 26 – Asio otus; 27 – Streptopelia decaocto; 28 – Merops apiaster; 29 – Asio flammeus; 30 – Aquila pomarina; 31 – Bubo bubo; 32 – Columba oenas; 33, 34 – scheme and geometric profile of eggs with a complementarity index greater than 1,5 (rc=ri/lipz˃1,5); 35 – Athene noctua; 36 – Otus scops; 37 – Otus brucei; 38 – Merops apiaster; 39 – Strix aluco; 40 – Pygoscelis papua; 41 – Alcedo atthis; 42 – Merops superciliosus; 43 – Milvus migrans; 44 – Asio flammeus; 45 – Strutio camelus; 46 – Hieraaetus pennatus; 47 – Strix aluco; 48 – Accipiter nisus.
Figure 2 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 2. Relationship between the ovoid constructs with the diagonals of the square and the double square.
Figure 6 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 6. Ovoid profiles (a) Erkoca, 2021; (b) Rojas, 2002; (c) Dixon, 1987; (d) Petrović et al., 2010.
Figure 10 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 10. Schemes of taking measurements to calculate wurfs for eggs of different types: a - true ovoids; b, c - symmetric and asymmetric pseudoovoids.
Figure 1 in Discrete aggregate analysis of ovoid egg shapes in various bird species
Figure 1. Geometric constructor figures for constructing ovoids: (a) Vesica piscis with circles inside, (b) A fragment of the matrix to obtain ovoids.
Linked collectors and determiners for: Bird egg collection (TSZ-bird-egg) The Arctic University Museum of Norway.
Natural history specimen data linked to collectors and determiners held within, "Bird egg collection (TSZ-bird-egg) The Arctic University Museum of Norway". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/e64066e5-cfb1-4576-a6ed-47a1e09b5bd5">https://bionomia.net/dataset/e64066e5-cfb1-4576-a6ed-47a1e09b5bd5</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e64066e5-cfb1-4576-a6ed-47a1e09b5bd5">https://gbif.org/dataset/e64066e5-cfb1-4576-a6ed-47a1e09b5bd5</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: ANM Bird egg collection.
Natural history specimen data linked to collectors and determiners held within, "ANM Bird egg collection". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ac3608fe-71ff-43b4-84da-8b284d5b7b47">https://bionomia.net/dataset/ac3608fe-71ff-43b4-84da-8b284d5b7b47</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ac3608fe-71ff-43b4-84da-8b284d5b7b47">https://gbif.org/dataset/ac3608fe-71ff-43b4-84da-8b284d5b7b47</a>. Formatted as a Frictionless Data package.
Figure 3 in Cracking a Developmental Constraint: Egg Size and Bird Evolution
Figure 3. Relationship between egg weight and female body weight in extant birds. (A) Graph to discriminate between altricial [n = 96; filled circles; r2 = 0.906, p <0.001; egg mass = –0.659394 + 0.7889097.bodymass], and precocial [n = 113; open circles] (including super precocial [n = 29; grey triangles]; r2 = 0.801, p <0.001; egg mass = –0.164615 + 0.6451872.bodymass) taxa. Both of these results have significantly higher r2 values than those found for 100 bootstrap replicates that paired body and egg mass at random. (B) Bar chart showing that the three broad developmental modes seen in Neornithes are characterized by significantly different egg/female body mass relationships. Discrimination among all three groups is borne out by averaged data (Kruskal-Wallis test, p <0.005). Abbreviations: A, altricial; P, Precocial; SP, super precocial.
Figure 2 in Cracking a Developmental Constraint: Egg Size and Bird Evolution
Figure 2. Phylogenetic hypothesis for relationships amongst modern birds (Neornithes) showing altricial
Figure 4 in Cracking a Developmental Constraint: Egg Size and Bird Evolution
Figure 4. Relationship between femur length (approximates body mass) and egg mass in extant and fossil birds (n = 117; r2 = 0.758, p <0.001). These data show that both Confuciusornis (cartoon, open circle) and the similarly-sized Buttonquail (Turnix) (grey triangle) lay relatively small eggs compared to their body size (Appendix).
Data from: Unhatched eggs represent the invisible fraction in two wild bird populations
<p>Prenatal mortality is typically overlooked in population studies, which biases evolutionary inference by confounding selection and inheritance. Birds represent an opportunity to include this 'invisible fraction' if each egg contains a zygote but whether hatching failure is caused by fertilisation failure versus prenatal mortality is largely unknown. We quantified fertilisation failure rates in two bird species that are popular systems for studying evolutionary dynamics in the wild. over three years, finding that overwhelming majorities (99.9%) of laid eggs were fertilised. These systems thus present opportunities to eliminate the invisible fraction from life-history data.</p>
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Allen Brain Atlas
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