argus tortoise beetle (Chelymorpha cassidea) on field bindweed (Convolvulus arvensis) leaf at Ludwig Prairie IA 653A8985

            This delightful little argus tortoise beetle looks a lot like a lady beetle or ladybird/ladybug, but in fact it is in a totally different beetle family. This tortoise beetle's shell spreads out slightly at the bottom so it appears to be stuck to the leaf like a suction cup. That gives this tortoise beetle good protection from ants that might try to bother it. Not that many potential predators are going to bother the argus tortoise beetle since it feeds on the leaves of field bindweed that are filled with toxic chemicals. The beetles store those defensive chemicals in their body and then advertise their danger with those bold orange and black colors. 
   

Taken in: United States / Iowa / Spillville (show map)

Taken on: July 9, 2021

Tags:

argus

tortoise

Chelymorpha

cassidea

field

bindweed

Convolvulus

arvensis

leaf

Ludwig

Prairie

Preserve

Winneshiek

County

Iowa

Larry

Reis « less

Camera: Canon EOS 7D Mark II, f/5.0, 1/250 sec, 100mm, ISO 400 (more info) (hide info)

Camera:	Canon EOS 7D Mark II
Aperture:	f/5.0
Exposure Time:	0.004 sec (1/250)
Focal Length:	100mm
ISO:	400
Exposure Bias:	+1 EV
Flash:	Off, Did not fire
Exposure Program:	Shutter speed priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Show full info

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