Breeding Ecology and Nesting Success of Abbott's Babbler (Malacocincla abbotti)

2004 ◽  
Vol 116 (3) ◽  
pp. 275-277 ◽  
Author(s):  
Andrew J. Pierce ◽  
Korakoch Pobprasert ◽  
George A. Gale
Keyword(s):  
Nesting Success ◽  
Breeding Ecology

Breeding biology of the red-capped robin

2003 ◽  
Vol 51 (6) ◽  
pp. 533 ◽  
Author(s):  
Damian K. Dowling
Keyword(s):  
National Park ◽  
Predation Rate ◽  
Nesting Success ◽  
Breeding Biology ◽  
Laying Date ◽  
Breeding Ecology ◽  
Incubation Periods ◽  
Almost All ◽  
Breeding Seasons ◽  
Semi Arid

The breeding biology of the red-capped robin (Petroica goodenovii) (Petroicidae) was studied over two breeding seasons (2000–02) in Terrick Terrick National Park, Victoria. Breeding commenced in August and the last offspring fledged in January. Only females developed brood patches, built nests and incubated. However, both sexes fed the young. Clutch size ranged from one to three eggs, with a mean of 2.1, with clutches of three occurring relatively early in the season. For clutches of two, the period from laying of the first egg to hatching was 14 or 15 days, with a mean of 14.2. The time from hatching to fledging was 13–15 days, with a mean of 14. In all, 34% of nesting attempts successfully fledged offspring. On average, 0.62 fledglings were produced per nesting attempt, whilst 0.57 offspring reached independence. Nesting success peaked in October. Predation appears to be responsible for almost all nest failure, and predation rate varied over the season. Breeding pairs produced 0–3 broods per season (0–5 independent fledglings) and pairs that began nesting early in the season produced a greater number of independent offspring. Nestling weight was affected by both laying date and brood size. A comparative analysis within the Petroicidae, controlled for body size, revealed that species endemic to Australia have shorter incubation periods, and species from semi-arid and dry woodlands have longer incubation periods than other species. Findings from this study are discussed in relation to the breeding ecology of other members of the Petroicidae.

Nesting success and breeding ecology in a high-density population of Brown Kiwi (Apteryx mantelli)

2011 ◽  
Vol 111 (2) ◽  
pp. 148-154 ◽  
Author(s):  
Birgit Ziesemann ◽  
Dianne H. Brunton ◽  
Isabel C. Castro
Keyword(s):  
Nesting Success ◽  
High Density ◽  
Breeding Ecology ◽  
High Density Population ◽  
Density Population

Breeding ecology of the gadwall at Waterhen Marsh, Saskatchewan

1983 ◽  
Vol 61 (7) ◽  
pp. 1532-1539 ◽  
Author(s):  
James E. Hines ◽  
George J. Mitchell
Keyword(s):  
Brood Size ◽  
Open Water ◽  
Nesting Success ◽  
Breeding Ecology ◽  
Avian Predators ◽  
Mammalian Predators ◽  
Anas Strepera ◽  
Island Habitats ◽  
Very High ◽  
Nest Initiation

The nesting and brood ecology of the gadwall (Anas strepera) was studied at Waterhen Marsh, Saskatchewan, during 1972 and 1973. Prior to nesting, breeding pairs dispersed over the marsh in relation to the interspersion of open water and cover but later aggregated their nests in the safest insular habitats. The peak of nest initiation was late May and early June, while the peak of hatching occurred in early to mid-July. Early clutches (N = 295), initiated before June 20, averaged 10.37 ± 0.08 (± SE) eggs and late clutches (N = 27) averaged 8.00 ± 0.19 eggs. Nest densities and nesting success varied greatly between upland, ditchbank, and island habitats. Much of the variation in nesting success was caused by differences in the rate of mammalian predation between areas. Nest failure was attributed to desertion (9%), avian predators (9%), mammalian predators (4%), and unidentified predators (3%). An average of 9.97 ± 0.17 ducklings hatched from 260 successful clutches, but mean brood size decreased by 45% to 5.44 ± 0.50 (N = 9) by the time of flight. The overall productivity of Waterhen Marsh gadwalls was very high. Gadwalls breed later than do other ducks and thus gain several possible benefits including avoidance of competition and higher nesting success.

Breeding ecology of lapwing (Vanellus vanellus) in floodplains of the Nemunas River delta in 2006-2007

Ekologija ◽  
2008 ◽  
Vol 54 (1) ◽  
pp. 10-16
Author(s):  
Vitas Stanevičius ◽  
Mindaugas Mačiulis ◽  
Saulius Švažas
Keyword(s):  
River Delta ◽  
Breeding Ecology ◽  
Vanellus Vanellus

scholarly journals A multiscale assessment of Red-tailed Hawk reproductive success relative to urban density and habitat type

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Justin H White ◽  
Jessi L Brown ◽  
Zachary E Ormsby
Keyword(s):  
Urban Areas ◽  
Urban Expansion ◽  
Habitat Type ◽  
Nesting Success ◽  
Arid Environments ◽  
Hatch Date ◽  
Urban Density ◽  
Landscape Characteristics ◽  
Suburban Areas ◽  
Breeding Seasons

Abstract Despite the unique threats to wildlife in urban areas, many raptors have established successfully reproducing urban populations. To identify variations in raptor breeding ecology within an urban area, we compared metrics of Red-tailed Hawk reproductive attempts to landscape characteristics in Reno and Sparks, NV, USA during the 2015 and 2016 breeding seasons. We used the Apparent Nesting Success and logistic exposure methods to measure nesting success of the Red-tailed Hawks. We used generalized linear models to relate nesting success and fledge rate to habitat type, productivity to hatch date (Julian day) and hatch date to urban density. Nesting success was 86% and 83% for the respective years. Nesting success increased in grassland-agricultural and shrub habitats and decreased in riparian habitat within the urban landscape. Productivity was 2.23 and 2.03 per nest for the breeding seasons. Fledge rates were 72% and 77%, respectively, and decreased in riparian areas. Nestlings hatched earlier with increased urban density and earliest in suburban areas, following a negative quadratic curve. Nesting success and productivity for this population were high relative to others in North America. Productivity increased in habitats where ground prey was more accessible. We suggest that suburban areas, if not frequently disturbed, provide sufficient resources to sustain Red-tailed Hawks over extended periods. As urban expansion continues in arid environments globally, we stress that researchers monitor reproductive output across the urban predator guild to elucidate patterns in population dynamics and adaptation.

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

scholarly journals Tri-axial accelerometry shows differences in energy expenditure and parental effort throughout the breeding season in long-lived raptors

2021 ◽  
Author(s):  
Pascual LÓPEZ-LÓPEZ ◽  
Arturo M PERONA ◽  
Olga EGEA-CASAS ◽  
Jon ETXEBARRIA MORANT ◽  
Vicente URIOS
Keyword(s):  
Energy Expenditure ◽  
Parental Care ◽  
Breeding Season ◽  
Video Recording ◽  
Experimental Manipulation ◽  
Biparental Care ◽  
Breeding Ecology ◽  
Parental Effort ◽  
Ecological Data ◽  
Movement Trajectories

Abstract Cutting-edge technologies are extremely useful to develop new workflows in studying ecological data, particularly to understand animal behaviour and movement trajectories at the individual level. Although parental care is a well-studied phenomenon, most studies have been focused on direct observational or video recording data, as well as experimental manipulation. Therefore, what happens out of our sight still remains unknown. Using high-frequency GPS/GSM dataloggers and tri-axial accelerometers we monitored 25 Bonelli’s eagles (Aquila fasciata) during the breeding season to understand parental activities from a broader perspective. We used recursive data, measured as number of visits and residence time, to reveal nest attendance patterns of biparental care with role specialization between sexes. Accelerometry data interpreted as the Overall Dynamic Body Acceleration, a proxy of energy expenditure, showed strong differences in parental effort throughout the breeding season and between sexes. Thereby, males increased substantially their energetic requirements, due to the increased workload, while females spent most of the time on the nest. Furthermore, during critical phases of the breeding season, a low percentage of suitable hunting spots in eagles’ territories led them to increase their ranging behaviour in order to find food, with important consequences in energy consumption and mortality risk. Our results highlight the crucial role of males in raptor species exhibiting biparental care. Finally, we exemplify how biologging technologies are an adequate and objective method to study parental care in raptors as well as to get deeper insight into breeding ecology of birds in general.

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