Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

On Locomotory Movements in Birds and the Intention Movements Derived From Them

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Behaviour

This paper is intended to show that a great number of movements in birds, the origin of which has not hitherto been understood, are intention movements or movements derived from them. Pure intention movements (HEINROTH, 1910) being low intensity forms of innate behaviour patterns, are as a rule, the very first parts of an activity. Because many instinctive acts begin with a locomotory movement towards something (food, or a mate, or an enemy) most intention movements are low intensity forms of locomotion. In order to recognise pure intention movements therefore it is necessary to study the form of locomotory movements first. This is done in Chapter II, in which special attention is given to hopping and walking. It is shown that hopping involves not only the feet, but also movements of the body, the neck, the wings and the tail. Walking is "one-sided hopping", in which both feet are used alternately, and in which each foot is supported by body, neck, tail and wing movements. Chapter III discusses a number of intention movements. Chapter IV shows that the majority of intention movements are difficult to recognize because they have undergone a secondary evolutionary change (ritualisation) as an adaptation to a newly acquired function, that of acting as a social releaser. Comparison enables us to trace a number of principles involved in this secondary change, viz.: (1) exaggeration, (2) a shifting of thresholds of the component elements. and (3) loss of coordination between the component rhythms. Applying these principles, many so-called display, threat and begging movements can be understood as ritualised intention movements. Owing to the extreme scarcity of accurate comparative studies it is, in most cases, not possible to do more than make a guess as to the origin of a given movement. And although the available facts for the relatively better known groups such as the pigeons, ducks, and the Gallinaceous birds, support my relatively speculative conclusions, I should like to emphasize the need of accurate comparative studies aimed at a tracing of the origin of derived movements.

10.1163/156853951X00214
/content/journals/10.1163/156853951x00214
dcterms_title,pub_keyword,dcterms_description,pub_author
6
3
Loading
Loading

Full text loading...

/content/journals/10.1163/156853951x00214
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/156853951x00214
Loading

Article metrics loading...

/content/journals/10.1163/156853951x00214
1951-01-01
2016-12-06

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Behaviour — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation