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Project Noah Nature School
Sphecius grandis
Very large, roughly 40-45 millimeters in body length, robust. Colored as shown.
Several of these enormous wasps were visiting milkweed along the side of a dirt road in Chico Basin Ranch, adjacent to an artificial wetland. Surrounding habitat is degraded shortgrass prairie with cholla cacti.
Despite their size these are not aggressive insects. I approached them easily while they were occupied with feeding.
Spotted on Aug 5, 2013
Submitted on Jan 15, 2014
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