Weather fluctuations are linked to nesting success and renesting decisions in saffron finches

2021 ◽  
Author(s):  
Fernando Marques‐Santos ◽  
Uschi Wischhoff ◽  
Marcos Rodrigues
Keyword(s):  
Nesting Success

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 Patch Size and Landscape Effects on Density and Nesting Success of Grassland Birds

2006 ◽  
Vol 70 (1) ◽  
pp. 158-172 ◽  
Author(s):  
MAIKEN WINTER ◽  
DOUGLAS H. JOHNSON ◽  
JILL A. SHAFFER ◽  
THERESE M. DONOVAN ◽  
W. DANIEL SVEDARSKY
Keyword(s):  
Patch Size ◽  
Grassland Birds ◽  
Nesting Success ◽  
Landscape Effects

Water Level Dynamics in Wetlands and Nesting Success of Black Terns in Maine

Waterbirds ◽  
2005 ◽  
Vol 28 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Andrew T. Gilbert ◽  
Frederick A. Servello
Keyword(s):  
Water Level ◽  
Nesting Success

Nesting Success of White-Tipped Doves in South Texas

1987 ◽  
Vol 51 (4) ◽  
pp. 791 ◽  
Author(s):  
Charles P. Boydstun ◽  
Charles A. DeYoung
Keyword(s):  
Nesting Success ◽  
South Texas

scholarly journals Predator guards on nest boxes improve nesting success of birds

2017 ◽  
Vol 41 (3) ◽  
pp. 434-441 ◽  
Author(s):  
Robyn L. Bailey ◽  
David N. Bonter
Keyword(s):  
Nesting Success ◽  
Nest Boxes

scholarly journals Marsh Rice Rat, Oryzomys palustris, Predation on Forster's Tern, Sterna forsteri, Eggs in Coastal North Carolina

2003 ◽  
Vol 117 (4) ◽  
pp. 654
Author(s):  
John H. Brunjes ◽  
W. David Webster
Keyword(s):  
North Carolina ◽  
Stomach Contents ◽  
Nesting Success ◽  
Small Islands ◽  
Island Area ◽  
Harbor Island ◽  
Cedar Island ◽  
Marsh Rice Rat ◽  
Oryzomys Palustris

Nesting success of Forster’s Terns (Sterna forsteri) was examined on two small islands in the Cedar Island area of North Carolina. Forster’s Terns laid an average of 2.1 eggs per nest (n = 50) on Chainshot Island and 2.1 eggs per nest (n = 43) on Harbor Island in clutches that consisted of 1 to 3 eggs. On Chainshot Island every egg (n = 107) was lost to predation. On Harbor Island, 72 of 92 eggs were preyed upon. A trapping program, initiated on both islands, yielded 32 Marsh Rice Rats (Oryzomys palustris). Stomach contents of 23 rats were inspected, with 92.3% from Chainshot Island and 70% of the stomachs from Harbor Island containing yolk and feathers of Forster’s Terns.

Sign in / Sign up

Export Citation Format

Share Document