David Noton / Cyclists riding bikes along riverside path at dawn, near Vang Vieng, Laos, March 2009.

Cheryl-Samantha Owen / SANCCOB Conservation and seabird education, Cape Town, South Africa. Weston Barwise uses 'Rocky' a Southern rockhopper penguin (Eudyptes chrysocome), to help him teach children about seabirds and mari...

Juergen Freund / Mahonia Na Dari (Guardian of the Sea) Teacher Lorna Romaso leads a group of 16 students to snorkel and learn about the reef. West New Britain, Papua New Guinea, May 2010

Nick Garbutt / Students practicing macro flower photography in Alpine flower meadow. Tyrol, North Tyrol, Austria. June 2018.

Karine Aigner / Graduate student and biological technician Emily Gati of the University of Florida, holding a trap containing an invasive Argentine black and white tegu (Salvator merianae). The tegu is an adult male...

Karine Aigner / Graduate student and biological technician Emily Gati of the University of Florida, preparing to release a juvenile Argentine black and white tegu (Salvator merianae) from a trap. Florida, USA. Tegus...

Karine Aigner / Graduate student and biological technician Sarah Cooke of the University of Florida baits an Argentine black and white tegu (Salvator merianae) trap with an egg, and a potato (so that in the event tha...

Karine Aigner / Graduate student Jenna Cole, University of Florida, holds an invasive Argentine black and white tegu (Salvator merianae) that has been trapped and will be euthanased, Florida, USA. August 2018.

Karine Aigner / Graduate student from University of Florida baiting an Argentine black and white tegu (Salvator merianae) trap with an egg, and a potato. The egg is the bait, and the potato is put in so that in the e...

Karine Aigner / Graduate student Sarah Cooke of the University of Florida holding a trap containing an invasive Argentine black and white tegu (Salvator merianae) that will be euthanased. Florida, USA. August 2018.

Karine Aigner / Graduate student and biological technician holding a Argentine black and white tegu (Salvator merianae) that has been trapped and brought back to headquarters to be euthanized. This invasive species i...

Neil Aldridge / School children are taught about the value of rhinos and the dangers of poaching at a school near Zimbabwe's border with Botswana. September 2013.