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' .....
territorial behavior may affect a population do not appear to have been as ...
Operationally, territories are best defined in terms of areas “defended” over a ....
The prediction that dense breeding populations of a territorial species should ....
sequence of this, but offer less good chances of success (or, of course, if many
More than 700 bird species breed in North America, and the variations in their ...
Good territories provide potential nest sites, reliable food sources, and ... If all
goes well, the sperm penetrate through the wall of the ovum (egg) and ...
Songbirds and most seabirds have altricial young, meaning that the newly
hatched birds are ...
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 .....
Mar 5, 2014 ... We argue that, in territorial species, individual quality is a major ... This concept is
well supported by studies reporting differences in reproductive success in birds
and .... variation in breeding success, good quality individuals would have ... the
random factor effect defined as per the three approaches above, ...
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.
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
Great Horned Owls nest in a wider variety of sites than any other bird in the
Americas. ... If something happens to the entire first clutch of eggs early in the
breeding season, ... Minimum circular territory size has been recorded as just
under 0.1 square ... The facial disc and white bib are well defined by 11 weeks
and mottled ...
Nov 9, 2010 ... We have a pair of crows in our backyard that use our bird bath as a ... It appears
that all crows will join winter roosts, even territorial breeding crows. .... Great
Horned Owls take adults as well as nestling crows with great regularity. .... I
always say that if you want to tell the species of crow, ask it if it is an...
used by the males, and a good description of the male while dancing, while
Moreau ... species, which do not however dance, have been studied in respect of
territory ... unoccupied I cannot say whether both rings were used by the same
bird. .... of this species, as there appeared to be a greater number of females than