Species status of Cassin’s Sparrow in El Paso, TX, region throughout typical year. Data from J. Donaldson and B. Zimmer pers. comm.

Period startPeriod endStatus
Late DecFirst week MarVery scarce, 1–2 birds recorded in typical day of intense field work
First week MarFirst week MaySinging, common
First week MayMid-JulGone
Mid-JulMid-AugSinging heavily, common
Mid-AugSepSinging decreasing in intensity, stopping in Sep
SepDecGone, approximately 2 records for area