This dataset includes captures of mainly Grasshopper Sparrows (GRSP), but includes other songbirds. Each row pertains to an individual captured on a certain day. Individuals can repeat. Most captures include data on age, sex, head-bill, tarsus, wind chord, molt score, fat score, and mass. In many cases, a single feather was collected from each Grasshopper Sparrow for isotopic analyses, and when available, results of those data are included. Some individuals were measured for body composition (fat mass, lean mass, and body water) using a mobile Quantitative Magnetic Resonance (QMR) machine. Most individuals were bled in the field within 5 min of capture. The blood was chilled, centrifuged the same day, and plasma stored frozen for analyses of metabolite concentrations. Red blood cells were stored in lysis buffer for genotyping. All birds were banded with a USFWS band and adults were individually marked using a unique combination of 3 plastic colored leg bands. Birds captured as independent young or nestlings banded prior to fledge were only marked with the USFWS bands. All birds were released at the location of capture.
Variable Measured: Species, age, sex, capture date, location of capture, head-bill, tarsus, wind chord, molt score, fat score, and mass.
Species Code:Species Code Common Name Scientific NameBHCO Brown-headed Cowbird Molothrus aterGRSP Grasshopper Sparrow Ammodramus savannarumHESP Henslow Sparrow Ammodramus henslowii
Color Band Color Abbreviations:A GrayB Light BlueD Dark BlueG GreenK BlackO OrangeP PinkR RedS SilverW WhiteY Yellow Age:NG NestlingHY Hatch YearAHY After Hatch YearSY Second YearASY After Second YearTY Third YearATY After Third YearU Unknown
How aged or sexed:Plumage Young (hatch-year) birds have distinct plumage. Following their first year, GRSP cannot be sexed or aged by plumageCP Cloacal Protuberance present—indicates male in breeding conditionBP Brood Patch present—if >0.5, indicates female in breeding condition (males only lose a few belly feathers)OnNest Nestlings found in nest = known age. Birds flushed from nest sexed as femalesSong Males observed singing prior to capture (females don’t sing)Display Males observed displaying prior to capture (females don’t display)Molecular Molecularly sexed post-hocOssification Young (< 4 mo) birds have incomplete ossificationRecap If a bird was captured in a previous season, we can age precisely (if HY or NG at time for first capture), or know minimum age (if captured as AHY)
Sex:M MaleF FemaleU Unknown
CP:0 No evidence of swelling1 Very slight thickening2 Still longer than wide, but noticeably bulging3 Resembling the drawing in the front of Pyle guide4 Size of an unripe blueberry5 Size and color of an ripe blueberry
BP:1 Smooth feathers are dropped and some vascularization is evident, but most of the area is still rather smooth and dark red2 Vascularization is evident, some wrinkles are present, and some fluid is present under the skin, giving the area a pale, opaque, pinkish color3 Vascularization is at the maximum extent of the brood patch; the brood patch is thickly wrinkled, and much fluid is present under the skin4 Wrinkled, vascularization and fluid is mostly gone, skin retains many thin, dry, contracted wrinkles5 Molting with no vascularization or fluid, most wrinkles gone, and pinfeathers present only on breast with no other flight feather or body molt occurring
Molt:0 No molt1 Some pin feathers, adventitious flight feather molt, or very beginning stages of complete molt (i.e., dropped feathers but no new feathers grown in)2 Moderate molt. Multiple feather tracts and/or flight feathers or retricies3 Most tracts in molt including flight feathers and body
Fat:0 No fat visible in furculum1 A light covering or partial covering of fat on the inside of the furculum2 >10% full and <~35% full3 Roughly half full of fat4 Furculum ~75% full, fat typically extending out of furcular area at the top and some visible fat in wing pits and lower belly5 Furculum ~full-slightly bulging. Obvious fat reserves elsewhere on the body6 Furculum very bulging. Extensive fat reserves elsewhere
Observers: AB W. Alice BoyleAJH Alex HenryANB Allison BaysBV Bram VerheijenCES Chelsea SinkCKP Chyna PeiDDH Destiney HettDJS Dylan SmithEJW Emily WilliamsGW Virginia WinderHN Hunter NedlandJMG Jackie GehrtJMS Joseph SchmidtKEG Keil GareyLTA Lauren AngermeyerMLG Michaela GustafsonSKW Sarah WinnickiSLD Sarah DemaduraSVR Suzy Replogle Curnutt
For additional metadata information see: http://lter.konza.ksu.edu/sites/default/files/DC.pdf
For additional methods information see: http://lter.konza.ksu.edu/sites/default/files/MM.pdf