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From mid-February to mid-April, dedicated citizen scientists in Borrego Springs, California rise each day before dawn to stand in a fallow field to witness and count the transit of Swainson’s Hawks, often thousands of raptors in a few hours.
The Swainson’s Hawk makes a 7000-mile migration from the pampas of Argentina to breeding grounds in North America, pausing for a night or two in this ancient desert to feast on grasshoppers before ascending on the thermals created by the dawn sun to continue their journey north. Most mornings large kettles of Swainsons (sometimes mingling with Turkey Vultures) sprial slowly into the air before disappearing over the Santa Rosa mountain range.
From mid-February to mid-April, dedicated citizen scientists in Borrego Springs, California rise each day before dawn to stand in a fallow field to witness and count the transit of Swainson’s Hawks, often thousands of raptors in a few hours.
The Swainson’s Hawk makes a 7000-mile migration from the pampas of Argentina to breeding grounds in North America, pausing for a night or two in this ancient desert to feast on grasshoppers before ascending on the thermals created by the dawn sun to continue their journey north. Most mornings large kettles of Swainsons (sometimes mingling with Turkey Vultures) sprial slowly into the air before disappearing over the Santa Rosa mountain range.
