منابع مشابه
Tool-making and tool-using in the northern blue jay.
Laboratory-raised Northeirn blue jays (Cyanocitta cristata) have been observed tearing pieces from pages of newspaper and utilizing them as tools to rake in food pellets which were otherwise out of reach. The frequency of this behavior was dependenit upon the motivational state of the jay and the presence of food pellets.
متن کاملSearch Image Formation in the Blue Jay (Cyanocitta cristata).
Blue jays trained to detect Catocala moths in slides were exposed to two types of slide series containing these moths: series of one species and series of two species intermixed. In one-species series, detection ability increased with successive encounters with one prey type. No similar effect occurred in two-species series. These results are a direct demonstration of a specific search image.
متن کاملThe Green Bookshop.
Every now and again I come across an extraordinary book that changes in some ways how I think, and this is one of those books. It is hard to describe because at a basic level it appears strange that it exists at all; it is basically a book of book reviews, and how useful could that possibly be? The principal author, as well as one ‘with’ author, are general practitioners working in North London...
متن کاملSelections Reprinted from Mathematical
MR0864505 (90a:58201) 58G99; 35A99, 35B99, 53C42, 58-02 Gromov, Mikhael Partial differential relations. (English) Ergebnisse der Mathematik und ihrer Grenzgebiete (3) [Results in Mathematics and Related Areas (3)], 9. Springer-Verlag , Berlin, 1986. x+363 pp. $60.00. ISBN 3-540-12177-3 Around 1970, the world of differential geometry was astounded by the news that a young Russian by the name of ...
متن کاملSelections Reprinted from Mathematical
MR0004042 (2,309c) 20.0X Brauer, R.; Nesbitt, C. On the modular characters of groups. Annals of Mathematics. Second Series 42 (1941), 556–590. The authors first summarize the theory of modular characters of a finite group G as previously developed by them [Univ. of Toronto Studies, Math. Series, no. 4, 1937]. If an element of G is defined to be p-regular when its order is prime to p, one of the...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1970
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay4144