scholarly journals BREEDING ECOLOGY OF THE CRESTED SERPENT EAGLE Spilornis cheela (LATHAM, 1790) (AVES: ACCIPITRIFORMES: ACCIPITRIDAE) IN KOLLI HILLS, TAMIL NADU, INDIA

2012 ◽  
Vol 4 (2) ◽  
pp. 77-82
Author(s):  
Varadarajan Gokula
Keyword(s):  
Food Habits ◽  
Tamil Nadu ◽  
Nest Site ◽  
Nest Site Selection ◽  
Site Preference ◽  
Breeding Ecology ◽  
Forest Edges ◽  
Kolli Hills ◽  
The Mean ◽  
Prey Items

The breeding ecology of the crested serpent eagle (Spilornis cheela), focusing on nest-site selection, food habits, and perch-site preference, was studied in the Kolli Hills of Tamil Nadu, India, from May 2005 to May 2010. Thirty-two active nests were located, with nest-site details collected from 27 nests that were accessible. The crested serpent eagle did not construct new nests, but did renew or alter old nests, mainly in December. Both sexes were involved in the nest renewal activities. The clutch size was one, the mean incubation period was 41.5 days, and the mean fledging period was 64.5 days. Nests were found largely along riverine patches. The results indicate the mature and less disturbed riverine forests with large sized trees are critical for the breeding and conservation of this species. The food habits of the eagle were known from prey items brought into the nest by the adult to feed the chick and prey items fed on by the adult. In total, 173 feeding observations were made and the prey items belonged to 17 species of vertebrates. The crested serpent eagle largely preferred reptiles, which accounted for 74% of their diet, followed by birds, which accounted for 18% of their diet. A total of 1237 perching records were observed. The crested serpent eagle preferred to perch on the outer canopy of the trees found largely in the forest edges.

scholarly journals Nest site selection and breeding ecology of the Ferruginous Duck (Aythya nyroca) in Algeria

2021 ◽  
Vol 26 ◽  
pp. e01524
Author(s):  
Karim Loucif ◽  
Mohamed Cherif Maazi ◽  
Moussa Houhamdi ◽  
Haroun Chenchouni
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Nest Site Selection ◽  
Breeding Ecology

Nest‐site selection and breeding ecology of Sky LarksAlauda arvensisin Hungarian farmland

Bird Study ◽  
2009 ◽  
Vol 56 (2) ◽  
pp. 259-263 ◽  
Author(s):  
Sarolta Erdős ◽  
András Báldi ◽  
Péter Batáry
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Nest Site Selection ◽  
Breeding Ecology

Factors predicting summer nest construction of Muscardinus avellanarius in deciduous woodland edges in Slovakia

Biologia ◽  
2015 ◽  
Vol 70 (1) ◽  
Author(s):  
Alexander Čanády
Keyword(s):  
Plant Species ◽  
Nest Site ◽  
Site Preference ◽  
Nest Construction ◽  
Forest Edges ◽  
Time Data ◽  
Rubus Fruticosus ◽  
Deciduous Woodland ◽  
Hazel Dormouse ◽  
Muscardinus Avellanarius

AbstractForest edges with diverse vegetation are an important feature of habitat preference for the hazel dormouse Muscardinus avellanarius. Therefore, this study was conducted to determine the factors predicting summer nest construction in deciduous woodland edges in Slovakia. At the same time, nest types, dimensions of nests and nest-site preference in shrubs and young trees were analysed. A total of 178 summer nests were found over the years 2010-2013 on the branches of several plant species, but mainly on Prunus spinosa, Rubus fruticosus and Carpinus betulus. The principle component analysis (PCA) in this study revealed that several factors were significant for the construction of nests in shrubby vegetation. The occurrence of four nest types (mixed, layered, foliar and grassy) with relatively large dimensions was confirmed. Botanical analysis of the leaf material in the nests confirmed that ten different plant species were incorporated into the nests. Moreover, a positive correlation was shown between the distance of the nest from the ground and from the top of the plant and the plant height. This study suggests that this micro-habitat may play an important role for suitable nesting of the hazel dormouse, as stated by several authors from the different countries and regions of its large distributional range. At the same time, data on the presence or absence of summer nests in the monitored habitat aid in the detection of species.

scholarly journals Selection of Urbanized Areas by Magpie Pica pica in a Medium Size City in Poland

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1738
Author(s):  
Olaf Ciebiera ◽  
Paweł Czechowski ◽  
Federico Morelli ◽  
Robert Piekarski ◽  
Marcin Bocheński ◽  
...  
Keyword(s):  
Nest Site ◽  
Habitat Type ◽  
Average Density ◽  
Nest Site Selection ◽  
Medium Size ◽  
Pica Pica ◽  
Environmental Preferences ◽  
Anthropogenic Habitats ◽  
The Mean ◽  
Agricultural Areas

The Magpie Pica pica occurs all over open agricultural areas in Poland, especially near human settlements (particularly in western Poland). The aim of this study was to estimate the size of the local Magpie population and characterize, in detail, nest site selection in a medium size city Górzów Wlkp. in the XXI century. For this study, the whole city was divided into a total of 114 squares of 1 × 1 km. Data were collected in spring 2014. A total of 474 Magpie pairs were recorded. The average density was 5.5 pairs/km2 (min = 0, max = 22 nests/square), in the non-urbanized habitat type—3.7 p/km2, and in the urbanized habitat type—13.5 p/km2. Magpie nests were found most often on Spruces Picea sp. and Poplars Populus sp. The mean height of the nest site was 11.5 m, while the mean height of trees used for nesting was 13.4 m. The type of tree arrangement most frequently used for nesting was tree rows (26.3%), followed by single trees (24.6%) and clusters of 4–10 trees (20.1%). The results for the Magpie’s environmental preferences do not differ from the general patterns described earlier. The study shows that magpies can adapt to changing urbanization factors, and changes in the choice of conifers help the species to adapt to highly anthropogenic habitats.

scholarly journals Nest-site preference of Hooded Crow (Corvus cornix L.) in Debrecen, Hungary

2011 ◽  
pp. 13-17
Author(s):  
László Kövér ◽  
Lajos Juhász ◽  
Péter Gyüre
Keyword(s):  
Tree Species ◽  
Nest Site ◽  
Nest Site Selection ◽  
Site Preference ◽  
Hooded Crow ◽  
Corvus Cornix ◽  
Insignificant Difference ◽  
Different Characteristics ◽  
Hooded Crows ◽  
The Given

In the past decade, the population of the Hooded Crow has shown significant growth in Debrecen, Hungary. The aim of this study was to become acquainted with the nest-site selection behavior of Hooded Crows in urban spaces. While our research revealed that the Hooded Crow is not particular when it comes to selecting among tree species for nesting, we did notice differences regarding nesting height. Hooded Crows living in the city build their nests higher up than those living outside Debrecen’s city limits. We also discovered a slight, insignificant difference between nesting heights and tree species, which is probably due to the different characteristics of the given tree species. As for nesting heights, we found that in typical urban habitats there were no relevant differences. However, when we compared these habitats in pairs, it came to light that nesting heights -when comparing solitary trees - wood segments and tree rows - wooded segments- did show significant differences, which can be explained by the various conditions provided by the habitats mentioned.In summary, the following results emerged from our research:1. The Hooded Crow prefers approximately the same nesting heights in all kinds of habitats, urban environment and tree species.2. The nesting height does not significantly depend on the habitat itself or on the tree species.

scholarly journals Selección del sitio de anidación de individuos de tortuga baula (Dermochelys coriacea, Testudines: Dermochelyidae) en Tortuguero, Costa Caribe de Costa Rica

2015 ◽  
Vol 63 (2) ◽  
pp. 491 ◽  
Author(s):  
Noga Neeman ◽  
Ingo S. Wehrtmann ◽  
Federico Bolaños
Keyword(s):  
Nest Site ◽  
Nest Success ◽  
Population Level ◽  
Middle Part ◽  
Nest Site Selection ◽  
Dermochelys Coriacea ◽  
Site Preference ◽  
Emergence Success ◽  
Selection For ◽  
Initial Choice

<p>Nest site selection for individual leatherback sea turtles, <em>Dermochelys coriacea, </em>is a matter of dispute. Some authors suggest that a female will tend to randomly scatter her nests to optimize clutch survival at a highly dynamic beach, while others suggest that some site fidelity exists. It is also possible that both strategies exist, depending on the characteristics of each nesting beach, with stable beaches leading to repeating nest site selections and unstable beaches leading to nest scattering. To determine the strategy of the Tortuguero population of <em>D. coriacea</em>, female site preference and repetition were determined by studying whether females repeat their nest zone choices between successive attempts and whether this leads to a correlation in hatching and emergence success of subsequent nests. Nesting data from 1997 to 2008 was used. Perpendicular to the coastline, open sand was preferred in general, regardless of initial choice. This shows a tendency to scatter nests and is consistent with the fact that all vertical zones had a high variability in hatching and emergence success. It is also consistent with nest success not being easily predictable, as shown by the lack of correlation in success of subsequent nesting attempts. Along the coastline, turtles showed a preference for the middle part of the studied section of beach, both at a population level and as a tendency to repeat their initial choice. Interestingly, this zone has the most artificial lights, which leads to slightly lower nest success (though not significantly so) and hatchling disorientation. This finding merits further study for a possibly maladaptive trait and shows the need for increased control of artificial nesting on this beach.</p><p><strong> </strong></p>

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