Roosting behaviour Research Papers - Academia.edu (original) (raw)

O.A. Bresgunova. Magpie (Pica pica) roosts: individual behavioural strategies,
communal roosts’ organization and habitat preference. – The organization of communal roost
is poorly understood in most corvids. I investigated the distribution of main communal roosts
and sub-roosts of Magpie (Pica pica). 15 cluster Magpie roosts, which include main
roost sites and several sub-roosts, were discovered in Kharkov city in 2002-2009 years. The
general numbers of Magpies’ population within Kharkov city vary in different years from 6500
to 8000 ind. (mean 7360 ind.; n = 5). The Magpie is a sedentary species and maintains breeding
territories year-round while travelling long distances (from 1,7 to 6,5 km, mean 3,95 km; n = 15)
to roost communally at night in wintertime. The catchment area of communal roosts varied
from 3,6 to 50 km² (n = 15). All Magpie communal roosts include main roost with 1‑3 sites
for sleeping (which Magpies use simultaneously or in different years) and some sub-roosts.
The main roosts exist year-round on traditional territories. The Magpies form sub-roosts from
April to November and after sub-roost departure birds congregate on main roost sites. The
distance between main communal roost site and sub-roosts sites vary from 1,8 to 4,7 km (mean
3,6 km; n = 5). 80,55% of main communal roost sites are confined to floodplain terraces and
birds prefer to sleep in willow (Salix cinerea) bushes and reeds (Phragmites australis) (61,11%)
(n = 36). The more are the numbers of Magpies on communal roost site in winter the more is
the catchment area of the roost (Spearman rank correlation R = 0,956; p < 0,01), the more is
the maximum catchment radius of the roost (R = 0,716; p < 0,01), and the more individuals
participate in roost formation in breeding period (R = 0,803; p < 0,01). The numbers of Magpies
at main roost sites don’t change from early December to the end of February. The numbers of
roosting Magpies decline from the end of March – early April. Minimum numbers of Magpies
was observed at main roost sites in April and May. In breeding period main roosts were mainly
joined by non-breeding Magpies, first-year birds and breeders from breeding territories, which
are closer 500 m to main roost sites. From August the numbers of roosting Magpies start toincrease. Main roosts include more communal roosting birds in breeding period than sub-roosts
(Mann‑Whitney U test; U = 17, p < 0,01). Consequently, non-breeding birds prefer to roost at
main roost sites. The breeding Magpies have two types of roosting behaviour in breeding period.
Females usually don’t join communal roost and often roost at the nest until fledglings leave
it. If the breeding territory is situated near communal roost site (up to 500 m) and fledglings
already left the nest females may fly to communal roost in the night. If the breeding territory
is nearby communal roost site (up to 500 m) breeding males travel to roost communally at
night when females incubate and brood and when fledglings already left the nest. Two adult
Magpies roosted on breeding territory in incubation and brooding periods but the distance
between their breeding sites and communal roost site exceeds 700 m. When the fledglings left
the nests on these territories, only one parent bird remains on breeding territory, another adult
bird participates in communal roost gathering. Distance between breeding territory and communal
roost, stage of breeding cycle and roosting behaviour of adjacent breeding pairs play
key roles in Magpie roosting strategies in breeding period. The Magpie’ broods roost within
parent breeding territory for 20‑40 days after leaving the nest. At age of 50‑65 days young birds
start to participate in communal roost gathering. The Magpies form pre-roosting
gatherings at breeding territories, near sites of traditional sub-roosts and along the way to roost
sites on tree tops (conifers and deciduous trees), in bushes and on roofs of buildings.

- by Olga Bresgunova
- •
- Ornithology, Corvids, Corvidae, Birds Ecology and Behaviour

http://www.commonswift.net/4818Bresqunova.html
Bresgunova O.A. The character of Common Swift (Apus apus) roosting behaviour. – The
character of roosting behaviour of Common Swift in Kharkov river flood-plain (Kharkov city,
Ukraine) from May to August 2005-2008 was described. Common Swift have been reported
roosting overnight on the wing, in the holes and, presumably, by hanging in the foliage of
deciduous and coniferous trees. From May to August we note aerial roosting with typical pre-roost
flying. Not all birds which participated in pre-roost flying demonstrated the similar roost strategies.
Some of Common Swifts slept in nest, another hold a night on trees or roosted on the wing. The last
migrant individuals used only aerial roosting.

- by Olga Bresgunova
- •
- Ornithology, Roosting behaviour

Dragonfly and damselfly encompass order Odonata of Arthropoda phylum. 474 species of odonates are found in India, amongst 5,952 species of odonates of the planet (Subramanian 2014). Bradinopyga geminata is one of 20 species of odonates of central Rajasthan, which feeds mainly on houseflies, mosquitoes, ants, aphids, butterflies and beetles. The species bears chromatic camouflage with black, white and grey colour (Andrew et al. 2008). An adult B. geminata has 26-29 mm wide abdomen, 33-36 mm long hind wings with grey thorax and brown eyes. The species prefers to roost on dark coloured compound walls, rock pools, boulders and other nearby places of small water collections. This species is commonly found in urban areas and breed in tanks and garden ponds. B. geminata prefers summer period for their roostings (Palot

- by Ashish Jangid and +1
- •
- Zoology, Conservation Biology, Ecology, Odonates

O.A. Bresgunova. Notes on Jay (Garrulus glandarius) roosts in Kharkov
city. — Roosting and pre-roosting behaviour of Jays (Garrulus glandarius) was investigated
in Kharkov city in 2010 – 2012. The size of pre-roosting aggregations of Jays is 4 to 15 birds.
Our study showed that Jays prefer to use Norway spruce (Picea abies) trees for roosting
(171 observations) in the course of a year. The birds rest on spruce branches at 4 – 13 m
above the ground (12,8% — at 4 – 6 m, 55,3% — at 7-9 m, 31,9% — at 10 – 13 m; n = 94).
In October (rarely August) to March the Jays also use for roosting Lombardy poplar (Populus
italica) trees. The birds settle on lateral branches near the trunk. We discovered 20 roosting
places of Jays on Lombardy poplar trees (30 observations). On poplar branches Jays roost
at 4,5 to 12 m above the ground (average 6,6 m; n = 20). Also Jays rarely roost on Norway
maple (Acer platanoides) (June-August), Sugar maple (A. saccharum) (June – August),
White poplar (Pоpulus аlba) (August), Grey willow (Salix cinerea) (winter), and Hawthorn
(Crataegus sp.) (winter). Jays settle for roosting at varying times e.g. as early as 2 hour
40 minutes before sunset to as late as 20 minutes after sunset. In July to March Jays settle
for roosting on average 45,4 minutes before sunset (n = 34). Some birds go to sleep with
difference of 30 – 40 minutes in the same evening (2 observations; February). Jays showed
morning activity 15 – 30 minutes before sunrise (3 observations; November, February, March).

- by Olga Bresgunova
- •
- Ornithology, Corvids, Birds, Corvidae

Multi-species communal roosts with participation of Magpie. Bresgunova O.A. – I recorded roosting behaviour of the Magpie (Pica pica) in 15 roost sites in 2003/2004, 2004/2005 and 2005/2006 winters. My goal was to discover avian species, which form multi-species roosts with Magpie at the same locations. The Fieldfare (Turdus pilaris), Starling (Sturnus vulgaris), Hooded Crows (Corvus cornix), Rooks (C. frugilegus), Jackdaws (C. monedula), Water Rail (Rallus aquaticus), Redwings (Turdus merula), Song Thrushes (T. philomelos), Blue Tits (Parus caeruleus), Great Tits (P. major), European Greenfinches (Chloris chloris), Eurasian Siskins (Spinus spinus), Eurasian Linnets (Acanthis cannabina), Tree Sparrows (Passer montanus) and Waxwings (Bombycilla garrulus) form mixed communal roosts on the traditional Magpie roost sites.

- by Olga Bresgunova
- •
- Ornithology, Corvids, Corvidae, Roosting behaviour

Рецензенты: член-корр. НАНУ, д-р биол. наук, проф. И. Г. Емельянов д-р биол. наук, проф. А. И. Кошелев Б-63 Биоразнообразие и роль животных в экосистемах: Материалы VІІ Международной научной конференции. -Днепропетровск: Лира, 2015. -310 с.

- by Olga Bresgunova
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- Ornithology, Roosting behaviour, Birds of Ukraine

With the purpose of contributing to the knowledge and background on the populations of the Yellow-naped Parrot Amazona auropalliata in El Salvador, the results of the population estimated in the period 1992 to 1994 are presented, through the count in roosts of the Barra de Santiago Complex, located in the coastal area of El Salvador. A total of 88 evening counts were conducted, with a total of 132 hours of observation in six locations within the complex. The results indicate a population of 57 individuals in 1992, 88 individuals in 1993 and 112 individuals in 1994, while the annual average was 9.76, 7.67 and 7.27 individuals/roost, respectively. The Guayapa roost presented the maximum number of individuals counted during the entire study period, 46 individuals in 1994, followed by El Cabón with 31 individuals in 1994 and El Zapote with up to 29 individuals in 1993. While El Cajete, El Zanate and Santa Rita were the least abundant in that same period, with 15, 10 and 7 (1993, 1994, 1993) respectively. The birds were more abundant after the reproductive period, a fact associated with the dispersal of the juveniles. These results show an important antecedent for the current understanding of population size, its reduction and sites of importance for the species.

- by Nestor Herrera
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- Mangroves, El Salvador, Parrots (Ornithology), Birds

O.A. Bresgunova. On roosting behaviour of Coot (Fulica atra). — The results of
observations of roosting and pre-roosting behaviour of Coots (Fulica atra) at Osnovyanskoe
reservoir (Kharkov city) in October – December 2005, August – December 2006, April –
October 2007, March – December 2008 were presented. Coots form roosting gathering at
Osnovyanskoe reservoir from April to December when it was free from ice. The maximum
number of Coots at roost occurred in mid August to mid October in different years. The
integrated roosting gathering was observed in mid to late October, while till that time the
birds can form several roosting groups.

- by Olga Bresgunova
- •
- Ornithology, Roosting behaviour

Bresgunova O.A. The roosting behaviour of Tree (Passer montanus) and House
(P. domesticus) Sparrows in comparative analysis. – We examined the roosting behaviour of
Tree and House Sparrows in Kharkov city in 2005-2008. Both species form communal roosts on
traditional territories. Tree Sparrow form communal roosts from the end of July (sometimes from
May) to October (sometimes to December). Vegetation used for roosting included Common Reed
(Phragmites australis), Grey Willow (Salix cinerea), Blackthorn (Prunus spinosa), Russian-olive
(Elaeagnus angustifolia), Hawthorn (Crataegus sp.) and others. Pair roosting at nest took place in
winter at night but before Tree Sparrows start to form aggregations nearly colony territories.
Nonbreeding birds form communal roosts during winter. The House Sparrows in contrast to Tree
Sparrows form communal roosts during winter period in conifers. After breeding when fledglings
leave the nests House Sparrows form communal roosts only in deciduous trees. It is typical for them
to change roosting vegetation consecutively within the limits of radius of 1,5 km.

- by Olga Bresgunova
- •
- Ornithology, Roosting behaviour, Communal Roosting
- by Olga Bresgunova
- •
- Ornithology, Corvids, Corvidae, Roosting behaviour

O.A. Bresgunova. - Companions of the magpie at communal roosts.
I observed roosting behaviour of the Magpie (Pica pica) in 15 communal winter roost congregations
that used a total of 28 sites for roosting in Kharkov in 2003–2009, three in the Kharkov Region in 2005–2009 and one in Kiev in 2007. My goal was to find out which species form multi-species roosts with the Magpie at the same locations. In Kharkov, Magpie roost congregations exist all year round. WeWe found 15 communal roosts of the Fieldfare (Turdus pilaris) and the Magpie in Kharkov and three in Kharkov Region. Magpies outnumber the Fieldfares at the majority of communal roosts. The maximal numbers of the Magpie in the mixed congregations was about 2 500 and the numbers of the Fieldfare in them was 600. The Starling (Sturnus vulgaris) share communal night roost with the Magpie from April to December with the maximal numbers of 650 in August through October. In addition, Starlings form huge (about 3 000 individuals) winter roost congregations on the Magpies’ roost sites. Hooded Crows (Corvus cornix), Rooks (C. frugilegus), and Jackdaws (C. monedula) also form roost congregations on one of the magpie roost sites in Kharkov and on one in Kiev. In Kharkov, the numbers of roosting Magpies vary from 30 to 150 depending on the period of year. Hooded Crows form communal roost from mid-October to early April in the same location. Magpies arrived at the roost site independently and earlier than Crows and formed compact roosting group. The Crows’ arrival forced Magpies to change roosting place and spend the night in several other places. Eurasian Tree Sparrows (Passer montanus) share roosts with the Magpie on seven traditional communal roost sites. WeWe recorded Blackbirds (Turdus merula), Song Thrushes (T. philomelos), Redwing (T. iliacus), European Robin (Erithacus rubecula), Common Ravens (Corvus corax), Eurasian Jays (Garrulus glandarius), Blue Tits (Parus caeruleus), Great Tits (P. major), European Greenfinches (Chloris chloris), Eurasian Siskins (Spinus spinus), Eurasian Linnets (Acanthis cannabina), European Goldfinches (Carduelis carduelis), Hawfinches
(Coccothraustes coccothraustes), Chaffinches (Fringilla coelebs), Eurasian Bullfinches (Pyrrhula pyrrhula),
Yellowhammers (Emberiza citrinella), White WaWagtails (Motacilla alba), Citrine WaWagtail (Motacilla citreola), Northern House-Martins (Delichon urbica), Barn Swallows (Hirundo rustica), Sand Martins (Riparia
riparia), WaWaxwings (Bombycilla garrulus), and WaWater Rail (Rallus aquaticus) on the traditional Magpies’ communal roost sites. Thus, 29 companion species were found on the traditional communal roost sites of the Magpies.

- by Olga Bresgunova
- •
- Ornithology, Corvids, Corvidae, Roosting behaviour

During day roosts surveys for bats in the Parque Nacional Natural Tayrona, northern Colombia, we found occupied tents made of leaves of the palm species Sabal mauritiiformis and Cocos nucifera. We found Artibeus jamaicensis and Uroderma convexum using the tents, with groups of U. convexum ranging from 1 to 23 individuals, and a single occurrence for A. jamaicensis. A tent was simultaneously occupied by U. convexum and Thecadactylus rapicauda (Squamata). Although tent-roosting is known to be a widespread behavior for stenodermatine bats, these are the first observations of tent-roosting bats in northern Colombia and highlight a high potential for finding tent-using bats in the region. RESUMEN. Uso de tiendas de hojas por Artibeus y Uroderma (Chiroptera, Phyllostomidae) en el norte de Colombia. Durante una búsqueda diurna de refugios de murciélagos en el Parque Nacional Natural Tayrona, en el norte de Colombia, encontramos tiendas hechas de hojas de las palmeras Sabal mauritiiformis y Cocos nucifera. Encontramos a Artibeus jamaicensis y Uroderma convexum utilizando las tiendas, con grupos de U. convexum que variaban de 1 a 23 individuos y una sola ocurrencia de A. jamaicensis. Una tienda era ocupa-da simultáneamente por U. convexum y Thecadactylus rapicauda (Squamata). Aunque se sabe que el acampar en tiendas es un comportamiento generalizado para los murciélagos stenodermatine, estas son las primeras observaciones de murciélagos tienderos en el norte de Colombia y destacan un alto potencial para encontrar murciélagos que usan tiendas en la región.

- by Guilherme Siniciato Terra Garbino
- •
- Herpetology, Ecology, Mammalogy, Bats (Mammalogy)

We aerially marked red-winged blackbirds (Agelaius phoeniceus) roosting in cattail (Typha spp.) marshes in North Dakota to determine population turnover rates, size, and movements. We estimate that 250,700 red-winged blackbirds used four roosts marked in 1986. Daily turnover rates averaged 9.9% (SE = 2.4) in these roosts. Four roosts marked in 1988 harbored 91,900 blackbirds. These roosts exhibited high turnover rates, averaging 16.7% (SE = 4.8) per day throughout the study period. Marked birds were recovered a median distance of 10.0 km (range = l .7 - 54.3) from their roost. Numbers and turnover rates of birds using a given late summer roost may be dependent on ecological factors such as the quality of roosting habitat (e g., marsh size, density and areal coverage of cattails, water depth), and location and maturity of sunflower fields.

- by David Bergman
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- Human-wildlife conflicts, Sunflower breeding, Dispersal, Blackbirds
- by Olga Bresgunova
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- Ornithology, Corvids, Corvidae, Roosting behaviour

O.A. Bresgunova. Notes on roosting behaviour of Moorhen (Gallinula chloropus)
in Kharkov region. — Moorhens (Gallinula chloropus) often roost in reeds, especially
in winter. The birds can gather to roosting place in «running on water» manner in winter
time. The distance among pairs and groups of roosting birds was 50 cm to 30 m in winter.
In September – October Moorhens roost more separately. In June one bird tried to use a Box
Elder (Acer negundo) tree for roosting.

- by Olga Bresgunova
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- Ornithology, Roosting behaviour

THE ORGANIZATION OF THE HOODED CROW (CORVUS CORNIX) COMMUNAL ROOSTS IN KHARKOV
O.A.Bresgunova
I investigated the peculiarities of sea．sonal organization of the Hooded crow (Corvus cornix) communal roost sites in Kharkov city in 2003-2005. The Hooded crows form small (several hundred individuals) roosting aggregations from April on traditional territories. These roosting locations exist several months and roost sites are contiguous with preroosting territories. From the middle October crows begin to leave these roosting sites and move into remote traditional combined communal roost. This huge winter congregation may include 4500 individuals. The catchment radius of roost is at least 15-16 km. Our data indicates that the crows’ numbers on the large communal roost appreciably declined from the middle of March, though some individuals keep together on this territory until the beginning of April. On this territory the communal roosts of the Black-billed Magpies (from 30 to 150 depending on the period of the year), Rooks and Jackdaws (the maximal numbers in the middle of November and in the end of February) are located also.

- by Olga Bresgunova
- •
- Ornithology, Corvids, Corvidae, Roosting behaviour

The abnormal behaviour of a group of Barn Swallows roosting in a maize field is described in detail. Approximately 700 individuals forming a spherical flock performed spectacular manoeuvres over a maize field for several minutes. After... more

- by Oscar Gordo
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- Migration, Birds (Ecology), Behaviour, Birds
- by Olga Bresgunova
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- Ornithology, Corvids, Corvidae, Roosting behaviour

1. The formation of large communal roosts is a conspicuous phenomenon associated with a wide range of bird species successfully exploiting urban environments. In many Australian cities, the abundance of the Rainbow Lorikeet (2. We investigated the selection of roosting sites in this species in Brisbane, Australia, by comparing characteristics of both the general sites of these roosts as well as individual trees used within roosting sites and trees that were avoided.3. Lorikeets used a wide variety of tree types for roosting but demonstrated a clear preference for clumped trees within sparsely treed areas that received significantly more artificial light at night than otherwise suitable sites and trees nearby.4. These features of roosting sites may enhance the detection of nocturnal predators by Rainbow Lorikeets, suggesting a potential positive impact of anthropogenic lighting. Our findings provide valuable insights into the management of roost-related conflicts in urban areas. We e...

- by Savannah Daoud-Opit
- •
- Ornithology, Urban Ecology, Urban Birds Ecology, Birds Ecology
- by David Bergman
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- Human-wildlife conflicts, Wetland Management, Sunflower breeding, Glyphosate