In ethology, territory is the sociographical area that an animal of a particular
species ... In birds, golden eagles (Aquila chrysaetos) have territories of 9,000
hectares, least flycatchers' .....
A 'territory' can be defined as any defended area & most birds are territorial (in
the sense ... Birds should only defend territories if the benefits of defense
outweigh the costs. .... Several studies with a variety of species have revealed
that males (and ... So, when densities are high in the good (or rich) habitats, a
their ideas about the functions of bird territory—even if it deals with another group
of ... (b) that sexual as well as aggressive behaviour limits population density,. (c)
the frequency of ... In some instances it has been shown that where species of
different sizes ... fighting, and fighting and display in a clearly defined area. 2.
Jun 25, 2015 ... For Owls, as with other birds, the period during which nesting and ... the duration
of the breeding season, especially if the species involved is dispersive or
migratory. ... and a well-defined surrounding feeding territory against members of
... of Owls, and a few species, notably the Barn Owl, have adopted the .....
iv) Similarly, territorial birds usually defend territories against members of the
same species. ... If you had two species exhibiting interspecific territoriality what
... A) Definition. i) A territory has the following distinguishing features: ... Among
the most common are: food, mates, good nest sites, good places to hide from
An estimated 90 percent of all bird species are monogamous. Monogamy is
defined as one male mating with one female and forming a "pair ... Presumably
monogamy evolved in situations where young have a much better chance of
surviving if ... a territory containing a nest cavity), but experimental removal of
males has ...
The Warfare between Different Species and its Relation to the Territory .... There
may be some immature birds which, though they have not reached the necessary
.... Since the male isolates itself, it follows, if the union of the sexes is to be ...
utilise their powers of producing sound only under certain well-defined conditions
These birds occupy well-defined territories. ... are actually improving their
chances of eventually raising larger families than they would have if they started
right at it. ... Conversely, those species that employ helpers tend to be
Apr 1, 1987 ... Bird territories: A key to understanding bird behavior. American Birds 41: ... and
the theory of territoriality has this advantage. ... company of other species of
finches. ... with the simple, broad definition sug- gested by ... Ironically. Nice came
to know her birds so well ... one year to the next; if they survived.
Bird Species at BirdChannel.com ... song in a large shared-cage than a smaller
one, but not as much song if each canary has his own well-defined territory.