Behavioural and Hormonal Dynamics in a Partial Migrant — the Willow Tit

2003 ◽  
pp. 127-140 ◽  
Author(s):  
Bengt Silverin
Keyword(s):  
Willow Tit ◽  
Partial Migrant

LANDSCAPE DISTRIBUTION OF THE WILLOW TIT (PARUSMONTANUS, CONRADVONBALDENSTEIN, 1827) IN SOUTH BAIKAL IN NEST PERIOD

2018 ◽  
Vol 1 (11(56)) ◽  
pp. 7-9
Author(s):  
A.Yu. Glyizina ◽  
F.S. Safonov ◽  
V.O. Salovarov
Keyword(s):  
Baikal Region ◽  
Parus Montanus ◽  
Willow Tit ◽  
Nest Period ◽  
Landscape Distribution ◽  
South Baikal

This article focuses on the location of brown-headedtit (Parus montanus CONRAD VON BALDENSTEIN, 1827) on the territory southern Baikal region. The article presents literature data on the intra-landscape placement of chubby tit and gives a complete description of areas suitable for the habitat of these birds.

Steigende Bestandszahlen bei Spechten und anderen Vogelarten dank Zunahme von Totholz? | An increase in the population of woodpeckers and other bird species thanks to an increase in the quantities of deadwood?

2009 ◽  
Vol 160 (11) ◽  
pp. 334-340 ◽  
Author(s):  
Pierre Mollet ◽  
Niklaus Zbinden ◽  
Hans Schmid
Keyword(s):  
Forest Inventory ◽  
Bird Species ◽  
National Forest Inventory ◽  
Population Increase ◽  
National Forest ◽  
Forest Species ◽  
Breeding Populations ◽  
Willow Tit ◽  
Middle Spotted Woodpecker ◽  
Important Habitat

Results from the monitoring programs of the Swiss Ornithological Institute show that the breeding populations of several forest species for which deadwood is an important habitat element (black woodpecker, great spotted woodpecker, middle spotted woodpecker, lesser spotted woodpecker, green woodpecker, three-toed woodpecker as well as crested tit, willow tit and Eurasian tree creeper) have increased in the period 1990 to 2008, although not to the same extent in all species. At the same time the white-backed woodpecker extended its range in eastern Switzerland. The Swiss National Forest Inventory shows an increase in the amount of deadwood in forests for the same period. For all the mentioned species, with the exception of green and middle spotted woodpecker, the growing availability of deadwood is likely to be the most important factor explaining this population increase.

scholarly journals Longevity of Willow Tits (Poecile montanus): the significance of flock membership, social rank and body size

2018 ◽  
Vol 41 ◽  
pp. 13-18
Author(s):  
Olav Hogstad ◽  
Tore Slagsvold
Keyword(s):  
Body Size ◽  
Social Rank ◽  
Late Summer ◽  
High Rank ◽  
Subalpine Forest ◽  
Social Hierarchies ◽  
Willow Tit ◽  
Males And Females ◽  
Winter Flocks ◽  
Main Factor

The Willow Tit Poecile montanus is highly sedentary and breeding pairs remain in their exclusive areas throughout the year. During the winter, these areas are defended by small, non-kin flocks, formed as the roaming yearlings become sedentary and join adults during late summer and autumn. Once established, stable social hierarchies are maintained in these flocks during the winter. The winter flocks consist normally of the socially dominant adult mated pair and two mated juvenile pairs, one higher-ranked and one lower-ranked. Individually colour-ringed juvenile Willow Tits were followed over years in subalpine forest in Norway from ringing in the autumn till they disappeared. None of the lower ranked birds survived their first winter, whereas only 4 of 71 higher-ranked juvenile pairs disappeared during this time. Half of the 71 pairs survived their first winter, about 25 % survived two winters, 8.5% survived three winters, and 5.6% survived four winters. Survival was similar for males and females. Alpha pairs remained mated and defended their common territory across years. Maximum age as revealed by ringing showed one female became six years old and two males ringed as adults were at least nine years old when last observed. The main factor associated with survival was early flock establishment that led to a high rank position among the juvenile flock members. Body size seemed insignificant. Birds that survived their first winter either succeeded to establish as territory owners or they were forced into the role as floaters and probably perished.

scholarly journals Seasonal Patterns of Fat Deposits in Relation to Migratory Strategy in Facultative Migrants

2021 ◽  
Vol 9 ◽  
Author(s):  
Jamie M. Cornelius ◽  
Thomas P. Hahn ◽  
Ashley R. Robart ◽  
Ben J. Vernasco ◽  
Dorothy L. Zahor ◽  
...  
Keyword(s):  
Wing Loading ◽  
Long Distance ◽  
Flight Duration ◽  
House Finches ◽  
Fat Deposits ◽  
Migratory Season ◽  
Partial Migrant ◽  
Migration Strategies ◽  
Migratory Strategy ◽  
Red Crossbills

Physiological preparations for migration generally reflect migratory strategy. Migrant birds fuel long-distance flight primarily with lipids, but carrying excess fuel is costly; thus, the amount of fat deposited prior to departure often reflects the anticipated flight duration or distance between refueling bouts. Seasonal pre-migratory deposition of fat is well documented in regular seasonal migrants, but is less described for more facultative species. We analyze fat deposits of free-living birds across several taxa of facultative migrants in the songbird subfamily Carduelinae, including house finches (Haemorhous mexicanus), American goldfinches (Spinus tristis), pine siskins (Spinus pinus) and four different North American ecotypes of red crossbills (Loxia curvirostra), to evaluate seasonal fat deposition during facultative migratory periods. Our data suggest that the extent of seasonal fat deposits corresponds with migratory tendency in these facultative taxa. Specifically, nomadic red crossbills with a seasonally predictable annual movement demonstrated relatively large seasonal fat deposits coincident with the migratory periods. In contrast, pine siskins, thought to be more variable in timing and initiation of nomadic movements, had smaller peaks in fat deposits during the migratory season, and the partial migrant American goldfinch and the resident house finch showed no peaks coincident with migratory periods. Within the red crossbills, those ecotypes that are closely associated with pine habitats showed larger peaks in fat deposits coincident with autumn migratory periods and had higher wing loading, whereas those ecotypes associated with spruces, Douglas-fir and hemlocks showed larger peaks coincident with spring migratory periods and lower wing loading. We conclude that population averages of fat deposits do reflect facultative migration strategies in these species, as well as the winter thermogenic challenges at the study locations. A difference in seasonal fattening and wing loading among red crossbill ecotypes is consistent with the possibility that they differ in their migratory biology, and we discuss these differences in light of crossbill reproductive schedules and phenologies of different conifer species.

Recovery of willow tit food caches by other willow tits and by great tits

1992 ◽  
Vol 44 (1) ◽  
pp. 180-181 ◽  
Author(s):  
Jukka Suhonen ◽  
Kimmo Inki
Keyword(s):  
Willow Tit

scholarly journals Immigration and gene flow in a northern willow tit (Parus montanus) population

1999 ◽  
Vol 12 (2) ◽  
pp. 283-295 ◽  
Author(s):  
Orell ◽  
Lahti ◽  
Koivula ◽  
Rytkönen ◽  
Welling
Keyword(s):  
Gene Flow ◽  
Parus Montanus ◽  
Willow Tit
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