Ingo Arndt / Chimpanzee (Pan troglodytes) juvenile fishing for termites, endangered, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) swinging in, tree, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) pair grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) pair interacting, Gombe Stream National Park, Tanzania

Gerry Ellis / Mist atop hillsides covered in low montane tropical rainforest inside, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) mom and baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) group grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) mom, baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Gombe stream flowing through dense low montane tropical rainforest inside Gombe Stream National Park, Tanzania

Anup Shah / Alpha male Chimpanzee 'Frodo', 26-years-old, feeding on leaves {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002. Chimps have learnt that certain leaves can be used to tre...

Gerry Ellis / Chimpanzee (Pan troglodytes) baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) portrait, adult named Frodo, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) group, Gombe Stream National Park, Tanzania

Anup Shah / Male Chimpanzee sitting on tree buttress, Gombe NP Tanzania. Apollo

Anup Shah / Chimpanzee baby with resting mother {Pan troglodytes} Gombe NP, Tanzania

Anup Shah / Chimpanzees feeding, Gombe NP, Tanzania. Fifi and Ferdinano

Anup Shah / Juvenile Chimpanzee Flirt in tree {Pan troglodytes schweinfurthii} Gombe NP Tanzania

Anup Shah / Juvenile Chimpanzee 'Flirt' in tree {Pan troglodytes schweinfurthii} Gombe NP Tanzania

Anup Shah / Female Chimpanzee 'Fanni' 20-years-old, resting with sons Fundi, 17-months-old, and Fudge, 5-years-old {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzees gather round alpha male 'Frodo' in tree feeding on dead Bushbuck fawn {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Gremlin' 31-years-old, carrying twin daughters Golden and Glitter, 3-years-3-monhts-old, jockey riding {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Young male Chimpanzee 'Gold' 3-years-3-months-old, watches mother 'Gremlin' use stick as tool to catch termites {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzees mutual grooming {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Male Chimpanzee 'Paxo' 24-years-old, {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Young Chimpanzee hanging upside down in tree {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzees gather round alpha male 'Frodo' in tree with dead Bushbuck fawn {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzees mutual grooming {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Fanni' with offspring 'Fundi' (male, 17-months-old) and Fudge (male, 4-years-10-months-old) {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Alpha male 'Frodo' displays 'keep away' message to begging chimps wanting share of Bushbuck fawn prey {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Male Chimpanzee 'Sheldon' knuckle walking carrying dead Red colobus monkey in jaws {Pan troglodytes schweinfurtheii}, 19-years-old, high ranking male of Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Male Chimpanzee resting on rock 'Pax' {Pan troglodytes schweinfurtheii}, 25-years-old, lowest ranking male of Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Alpha male Chimpanzee 'Frodo', 26-years-old {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Adult Chimpanzee sitting while feeding and 'thinking' {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Ousted alpha male Chimpanzee 'Freud' feeding on mangoes, {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Patti' (39-years-old) carries jockey-riding offspring 'Tarzan' on her back {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee twins 'Golden' and 'Glitta' use stem as a tool to remove termites from a termite mound {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Young female Chimpanzee 'Golden' has learnt from her mother how to use a stem as a tool to remove termites from a termite mound {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania...

Anup Shah / Female juvenile Chimpanzee 'Golden' has learnt from her mother how to use a stem as a tool to remove termites from a termite mound {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanza...

Anup Shah / Female Chimpanzee 'Gremlin' demonstrates to offspring how to use a stem as a tool to remove termites from a termite mound {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzee mother 'Gremlin' carries female twins 'Golden' (in front) and 'Glitta' (behind) {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Gremlin' carries female twins 'Golden' and 'Glitta' {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Fifi' (44-years-old) rests with her ninth baby 'Furaha' (one-week-old) {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Flirt' (daughter of Fifi) 2-years-7-months-old playing in tree {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Male Chimpanzee 'Faustino' 12-years-old {Pan troglodytes schweinfurtheii} Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Fundi plays beside his resting mother 'Fanni' {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Two-year-old male 'Fundi' holds on to mother 'Fanni' who is calling in answer to group call {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002 *Not available for calendar...

Ingo Arndt / Chimpanzee (Pan troglodytes) mother with baby, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) male, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) juvenile in tree, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) grooming another individual, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) touching its foot, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) adult carrying infant on back, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) female nursing infant, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) female grooming male with infant sitting nearby, Gombe Stream National Park, Tanzania

Ingo Arndt / Buttressed root on rainforest tree, Gombe Stream National Park, Kakombe Valley, Tanzania

Ingo Arndt / Aerial view of tropical forest, Gombe Stream National Park, Kakombe Valley, Tanzania

Ingo Arndt / Mountain Gorilla (Gorilla gorilla beringei) the biggest living primate and Pygmy Marmoset (Cebuella pygmaea) smallest living primate two skulls, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) juvenile fishing for termites, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) baby leaning against a tree, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) mother with baby, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) mother with two babies sleeping in a day nest, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) alpha male 'Kris' knucklewalking across log, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) alpha male 'Kris' portrait, endangered, Gombe Stream National Park, Tanzania

Anup Shah / Waterfall, Gombe NP. Tanzania

Anup Shah / Baby Chimpanzee watches mother fish for termites with twig, 'Fifi' + 'Furaha', Gombe

Anup Shah / Chimpanzee juvenile with hand open showing thumb, Gombe NP. Tanzania 2002

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) visited by Jane Goodall, Gombe Stream National Park, Tanzania

Gerry Ellis / Gombe Land Crab, close-up portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) male portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Gombe Stream flowing through dense low montane tropical rainforest inside Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) at banana station, Gombe Stream National Park, Tanzania

Gerry Ellis / Leaf drip tips, tropical lowland rainforest, Gombe Stream, Tanzania

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) in cage visited by Jane Goodall, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) eating in tree, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) with Doctor Jane Goodall and Dale Peterson, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) with infant, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) group grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) named Frodo grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) grooming, train, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) foot, Gombe Stream National Park, central forested Africa

Gerry Ellis / Chimpanzee (Pan troglodytes) in rain, Frodo, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) young, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) holding infant, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) mom and baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) grooming baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Olive Baboon (Papio anubis) confrontation, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) group grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) foot, Gombe Stream National Park, Tanzania

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) visited by Jane Goodall, Gombe Stream National Park, Tanzania

Anup Shah / Male Chimpanzee resting, Gombe NP Tanzania. Freud

Anup Shah / Male Chimpanzee sitting in tree, Gombe NP, Tanzania

Anup Shah / Chimpanzee in tree {Pan troglodytes schweinfurthii} Gombe NP Tanzania

Anup Shah / Chimpanzee feeding on fruit in tree, Gombe NP, Tanzania