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Full-Text Articles in Social and Behavioral Sciences
Hatching And Fledging Times From Grassland Passerine Nests, Pamela J. Pietz, D.A. Granfors, Todd Grant
Hatching And Fledging Times From Grassland Passerine Nests, Pamela J. Pietz, D.A. Granfors, Todd Grant
USGS Northern Prairie Wildlife Research Center
Accurate estimates of fledging age are needed in field studies to avoid inducing premature fledging or missing the fledging event. Both may lead to misinterpretation of nest fate. Correctly assessing nest fate and length of the nestling period can be critical for accurate calculation of nest survival rates. For researchers who mark nestlings, knowing the age at which their activities may cause young to leave nests prematurely could prevent introducing bias to their studies. We estimated fledging ages from grassland passerine nests monitored from hatching through fledging with miniature video cameras in North Dakota and Minnesota during 1996-2001. We compared …
Nocturnal Activity Of Nesting Shrubland And Grassland Passerines, Christy Slay, Kevin Ellison, C.A. Ribic, Kimberly Smith, Carolyn Schmitz
Nocturnal Activity Of Nesting Shrubland And Grassland Passerines, Christy Slay, Kevin Ellison, C.A. Ribic, Kimberly Smith, Carolyn Schmitz
USGS Northern Prairie Wildlife Research Center
Nocturnal behaviors and sleep patterns of nesting passerines remain largely undocumented in the field and are important to understanding responses to environmental pressures such as predation. We used nocturnal video recordings to describe activity and quantify behaviors of females with nestlings of four shrub land bird species and three grassland bird species (n = 19 nests). Among the shrubland birds, Blue-winged Warbler (Vermivora pinus), Prairie Warbler (Setophaga discolor), and Indigo Bunting (Passerina cyanea) returned to the nest for the night at the same time, around sunset. Among the grassland birds, Eastern Meadowlark ( …
Development Of Camera Technology For Monitoring Nests, W. Andrew Cox, M. Shane Pruett, Thomas J. Benson, Scott J. Chiavacci, Frank R. Thompson Iii
Development Of Camera Technology For Monitoring Nests, W. Andrew Cox, M. Shane Pruett, Thomas J. Benson, Scott J. Chiavacci, Frank R. Thompson Iii
USGS Northern Prairie Wildlife Research Center
Photo and video technology has become increasingly useful in the study of avian nesting ecology. However, researchers interested in using camera systems are often faced with insufficient information on the types and relative advantages of available technologies. We reviewed the literature for studies of nests that used cameras and summarized them based on study objective and the type of technology used. We also designed and tested two video systems that we used for three nest predator and behavioral studies. We found 327 studies that recorded 255 bird species spanning 19 orders. Cameras were most commonly used to study nest predators …
Knowledge Gained From Video-Monitoring Grassland Passerine Nests, P. J. Pietz, D.A. Granfors, C.A. Ribic, F. R. Thompson
Knowledge Gained From Video-Monitoring Grassland Passerine Nests, P. J. Pietz, D.A. Granfors, C.A. Ribic, F. R. Thompson
USGS Northern Prairie Wildlife Research Center
In the mid-1990s, researchers began to adapt miniature cameras to video-record activities :rt cryptic passerine nests in grasslands. In the subsequent decade, use of these video surveillance systems spread dramatically, leading to major strides in our knowledge of nest predation and nesting ecology of many species. Studies using video nest surveillance have helped overturn or substantiate many long-standing assumptions and provided insights on a wide range of topics. For example, researchers using video data have (1) identified an extensive and highly dynamic predator community in grasslands that varies both temporally (e.g., by time of day, nest age, season, year) and …