EditorialAn extinct seasnake-like Mosasaur in the Niobrara sea, North America, late Cretaceous. A pterosaur, Pteranodon, at left, and sea turtle at right. Mosasaurs were probably giant sea monitor lizards of their time. Illustration from Wilhelm Bolsches Das Le...
EditorialExtinct giant Pterosaurs, Pterandodon genus, with a 9m wingspan, of the Niobrara sea, North America, Cretaceous period. Illustration by Hugo Wolff-Maage from Wilhelm Bolsches Das Leben der Urwelt, Prehistoric Life, Georg Dollheimer, Leipzig, 1932.
Editorialalong Niobrara River, Allen Bridge, 4 miles south of Sparks, Cherry, Nebraska, United States, Enallagma antennatum (Say, 1839), Animalia, Arthropoda, Insecta, Odonata, Zygoptera, Coenagrionidae.
Editorialalong Niobrara River, Allen Bridge, 4 miles south of Sparks, Cherry, Nebraska, United States, Argia emma Kennedy, 1915, Animalia, Arthropoda, Insecta, Odonata, Zygoptera, Coenagrionidae.
Editorialalong Niobrara River, Allen Bridge, 4 miles south of Sparks, Cherry, Nebraska, United States, Argia apicalis (Say, 1839), Animalia, Arthropoda, Insecta, Odonata, Zygoptera, Coenagrionidae.
EditorialAlong Niobrara River, 8 miles south of Norden, Nature Conservancy, Niobrara Valley Preserve, Brown, Nebraska, United States, Sympetrum semicinctum (Say, 1839), Animalia, Arthropoda, Insecta, Odonata, Anisoptera, Libellulidae.
EditorialAlong Niobrara River, 8 miles south of Norden, Nature Conservancy, Niobrara Valley Preserve, Brown, Nebraska, United States, Argia alberta Kennedy, 1918, Animalia, Arthropoda, Insecta, Odonata, Zygoptera, Coenagrionidae.
EditorialAn extinct seasnake-like Mosasaur in the Niobrara sea, North America, late Cretaceous. A pterosaur, Pteranodon, at left, and sea turtle at right. Mosasaurs were probably giant sea monitor lizards of their time. Illustration from Wilhelm Bolsches Das Le...
EditorialExtinct giant Pterosaurs, Pterandodon genus, with a 9m wingspan, of the Niobrara sea, North America, Cretaceous period. Illustration by Hugo Wolff-Maage from Wilhelm Bolsches Das Leben der Urwelt, Prehistoric Life, Georg Dollheimer, Leipzig, 1932.