March Female vermilion flycatchers join males at the Cienega. Listen for first night calls of common poorwills. Clouds of pink fairy duster cover the hills west of Arivaca. At the end of the month, orioles start showing up at headquarters, gray hawks arrive at the Cienega, and zone-tailed hawks start nesting in Brown Canyon. April Warblers use Arivaca Cienega and the Creek as migration rest stops, shorebirds and wading birds drop by Aguirre Lake.
Rattlesnakes are active.
Endangered Kearney blue star is flowering in Brown Canyon early in the month. Colorful mesquite bugs with red and black striped legs can be seen sucking sap from twigs. Check blooming ocotillo for hummingbirds. May Look for the first pronghorn fawns along the entry road at headquarters. Colorful summer and western tanagers, yellow-breasted chat, and blue grosbeaks are setting up housekeeping at Arivaca Creek.