Hawks: Measurements on Three Hawk Species

Description Format Details Source


Data for a samples of hawks from three different species


A data frame with 908 observations on the following 19 variables.

Month 8=September to 12=December
Day Date in the month
Year Year: 1992-2003
CaptureTime Time of capture (HH:MM)
ReleaseTime Time of release (HH:MM)
BandNumber ID band code
Species CH=Cooper's, RT=Red-tailed, SS=Sharp-Shinned
Age A=Adult or I=Imature
Sex F=Female or M=Male
Wing Length (in mm) of primary wing feather from tip to wrist it attaches to
Weight Body weight (in gm)
Culmen Length (in mm) of the upper bill from the tip to where it bumps into the fleshy part of the bird
Hallux Length (in mm) of the killing talon
Tail Measurement (in mm) related to the length of the tail (invented at the MacBride Raptor Center)
StandardTail Standard measurement of tail length (in mm)
Tarsus Length of the basic foot bone (in mm)
WingPitFat Amount of fat in the wing pit
KeelFat Amount of fat on the breastbone (measured by feel
Crop Amount of material in the crop, coded from 1=full to 0=empty


Students and faculty at Cornell College in Mount Vernon, Iowa, collected data over many years at the hawk blind at Lake MacBride near Iowa City, Iowa. The data set that we are analyzing here is a subset of the original data set, using only those species for which there were more than 10 observations. Data were collected on random samples of three different species of hawks: Red-tailed, Sharp-shinned, and Cooper's hawks.


Many thanks to the late Professor Bob Black at Cornell College for sharing these data with us.

statmanrobin/Stat2Data documentation built on Jan. 6, 2019, 1:08 a.m.