Entrance to Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Near to far: David Holway, Andy Suarez, and Ed LeBrun, ant researchers at work, Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Stem-nesting Cephalotes sp., Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Andy Suarez with Acromyrmex sp. thatch mound, Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Chad Tillberg, Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Ed LeBrun and David Holway, Reserva Natural Otamendi, Buenos Aires Prov., 2003.

L to R: Ed LeBrun, Andy Suarez, Chad Tillberg, and David Holway, Reserva Natural Otamendi, Buenos Aires Prov., 2003.

Andy Suarez looking at nest of Atta vollenweideri, along Rt. 11, north of Buenos Aires, 2003.

Snake near Villa Ocampo, Santa Fe Prov., 2003.

David Holway persuading snake not to hide under our car, near Villa Ocampo, Santa Fe Prov., 2003.

Andy Suarez and David Holway crossing stream, near Villa Ocampo, Santa Fe Prov., 2003.

L to R: Chad Tillberg, David Holway, Andy Suarez, and Ed LeBrun with sign at the swimming beach, Rio Parana, near Villa Ocampo, Santa Fe Prov., 2003.

"Never match wits with a Caecilian when death is on the line!" (apologies to Rob Reiner and The Princess Bride), Herradura Formosa Prov., 2003.

L to R: Andy Suarez, David Holway, and Chad Tillberg at Iguazu Falls, Missiones Prov., 2003.

Chad Tillberg and Ed LeBrun excavating colony of Dinoponera australis (Hymenoptera, Formicidae), near Iguazu Falls, Missiones Prov., 2003.

Throat of the Devil, Iguazu Falls, Missiones Prov., 2003.

Part of Iguazu Falls, Missiones Prov., 2003.

L to R: David Holway, Ed LeBrun, and Jo-anne Holley setting pitfall traps, near Villa Ocampo, Santa Fe Prov., 2004.

Chad Tillberg observing ant competition experiment, near Villa Ocampo, Santa Fe Prov., 2004.

L to R: Sean Menke, Chad Tillberg, and Jo-anne Holley with sign at the swimming beach, Rio Parana, near Villa OCampo, Santa Fe Prov.

Chad Tillberg's birthday . Explaining to Adolfo Pividori what we are doing in his pasture, near Villa Ocampo, Santa Fe Prov., 2004.

Ed LeBrun lighting burner for first time. Chris Smith taking cover under tub, near Villa Ocampo, Santa Fe Prov., 2004.

Ed LeBrun boiling water, near Villa Ocampo, Santa Fe Prov., 2004. Boiling water used to eliminate certain ant colonies without introducing pesticides.

Chad Tillberg and Ed LeBrun tending the water boiling operation. Near Villa Ocampo, Santa Fe Prov., 2004. Photo by Jo-anne Holley.

L to R: Ed LeBrun and Sean Menke, seated; standing, El Gran Jokey owner, Chad Tillberg, Jo-Anne Holley, David Holway, and Chris Smith, Thanksgiving.

L to R: LeBrun, Holley, Holway, Smith, Menke, Marisa Pividore, Tillberg, and Marcelo Pividore, near Villa Ocampo, Santa Fe Prov., 2004.

Jo-anne Holley and David Holway waiting for the pot to boil, near Villa Ocampo, Santa Fe Prov., 2004.

David Holway, amateur snake wrangler, near Villa Ocampo, Santa Fe Prov., 2004.

Bait for ant competition experiment, Herradura, Formosa Prov., 2004.

Aero Club, Villa Ocampo, 2004.

L to R: Ed LeBrun, pilot, and Chris Smith with single-engine Cessna, Aero Club, Villa Ocampo, 2004.

Aerial photo of small arm of Rio Parana, looking south, near Villa Ocampo, Santa Fe Prov., 2004. Our experimental pasture is west (right) of road.

Aerial photo of pasture with Rio Parana and road at top near Villa Ocampo, Santa Fe Prov., 2004. Small light dots are ant mounds.

Aerial photo of experimental pasture, near Villa Ocampo, Santa Fe Prov., 2004. Small light dots are ant mounds.

Looking back into plane. Chad Tillberg, Ed LeBrun, and Chris Smith's arm, near Villa Ocampo, Santa Fe Prov., 2004.

Wasps at Ocampo that stung Andy, 2005.

Andy Suarez, stung by wasps, 2005.

Black lighting at night after a rain, Ocampo, 2005.

Andy Suarez, Sarah Whitman, supervising Chris Smith as he digs Pogonomyrmex nest, 2005.

L to R: Neil Tsutsui, Sarah Whitman, Chris Smith, Andy Suarez, Chad Tillberg. Obligatory picture with Palometas sign, Ocampo, 2005.

Social spiders feeding communally on a large scarab beetle, Ocampo, 2005.

Andy Suarez digging a Paratrechina nest, Ocampo, 2005.

L to R: Neil Tsutsui, Chris Smith, Sarah Whitman, Andy Suarez, Chad Tillberg. Overlooking Iguazu Falls, 2005.

Chad Tillberg, Iguazu Falls, 2005.

L to R: Andy Suarez, Chris Smith, Sarah Whitman, Neil Tsutsui, Iguazu Falls, 2005.

Camponotus recruited to my watch, Iguazu, 2005.

Chad Tillberg, excavating Dinoponera australis nest, Iguazu, 2005.

Chris Smith, excavating Dinoponera australis nest, Iguazu, 2005.

Chad Tillberg, Chris Smith after a day of excavating Dinoponera australis nests, 2005.

Chad Tillberg and Sarah Whitman, excavating Dinoponera australis nest, Iguazu, 2005.

Park rangers, Andy Suarez, Chad Tillberg, Sarah Whitman, Otamendi, 2005.

Andy Suarez, southern end of the Apis mellifera collection transect, Miramar, Argentina, 2005.

Chad Tillberg and Andy Suarez, Miramar, 2005.

Andy Suarez, Sarah Whitman, Chad Tillberg, Miramar, 2005.

Sarah Whitman, Andy Suarez, Mar del Plata, 2005.

Sarah Whitman, Andy Suarez, a second later! Mar del Plata, 2005.