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  2. Bird (mathematical artwork) - Wikipedia

    en.wikipedia.org/wiki/Bird_(mathematical_artwork)

    The 500 line segments defined above together form a shape in the Cartesian plane that resembles a bird with open wings. Looking at the line segments on the wings of the bird causes an optical illusion and may trick the viewer into thinking that the segments are curved lines. Therefore, the shape can also be considered as an optical artwork.

  3. Ornithology - Wikipedia

    en.wikipedia.org/wiki/Ornithology

    Studies in bird behaviour include the use of tamed and trained birds in captivity. Studies on bird intelligence and song learning have been largely laboratory-based. Field researchers may make use of a wide range of techniques such as the use of dummy owls to elicit mobbing behaviour, and dummy males or the use of call playback to elicit ...

  4. Louis Agassiz Fuertes - Wikipedia

    en.wikipedia.org/wiki/Louis_Agassiz_Fuertes

    Louis Agassiz Fuertes (February 7, 1874 – August 22, 1927) was an American ornithologist, illustrator and artist who set the rigorous and current-day standards for ornithological art and naturalist depiction and is considered one of the most prolific American bird artists, second only to his guiding professional predecessor John James Audubon.

  5. Wikipedia : Featured pictures/Animals/Birds

    en.wikipedia.org/.../Animals/Birds

    Animals · Artwork · Culture, entertainment, and lifestyle · Currency · Diagrams, drawings, and maps · Engineering and technology · Food and drink · Fungi · History · Natural phenomena · People · Photographic techniques, terms, and equipment · Places · Plants · Sciences · Space · Vehicles · Other lifeforms · Other

  6. Avian foraging - Wikipedia

    en.wikipedia.org/wiki/Avian_foraging

    Avian foraging refers to the range of activities and behaviours exhibited by birds in their quest for food. In addition to their unique body adaptations, birds have a range of described behaviours that differ from the foraging behaviours of other animal groups. According to the foraging habitat, birds may be grouped into foraging guilds ...

  7. Number sense in animals - Wikipedia

    en.wikipedia.org/wiki/Number_sense_in_animals

    Birds were one of the first animal species tested on their number sense. A raven named Jacob was able to distinguish the number 5 across different tasks in the experiments by Otto Koehler. [ 5 ] Later experiments supported the claim of existence of a number sense in birds, with Alex , a grey parrot, able to label and comprehend labels for sets ...

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  9. Alex (parrot) - Wikipedia

    en.wikipedia.org/wiki/Alex_(parrot)

    Irene Pepperberg said the reward system is crucial, because it is the only way that students can make the direct connection between the object and the label that they have used. Food rewards are also sparingly used. Trainers sometimes make intentional mistakes so the students can see the consequences of an incorrect identification.