September 30, 2020
Orangutan Jungle School: Who is the Leader of the Pack?
Text by: BOS Foundation Communications Team in Nyaru Menteng September 30, 2020 — “Yooo! Buah, yooo!”, call out the surrogate mothers every morning at the… more…
Blog Archives
September 30, 2020
New Video: Afternoon Playtime
We hope you enjoy this behind-the-scenes video from BOS Nyaru Menteng, the world’s largest orangutan rescue and care center. We are facing difficult times due… more…
September 25, 2020
New Video: Orangutan Jungle School Morning Class
We hope you enjoy this behind-the-scenes video from BOS Nyaru Menteng, the world’s largest orangutan rescue and care center. We are facing difficult times due… more…
September 23, 2020
New Video: Off to Jungle School
We hope you enjoy this behind-the-scenes video from BOS Nyaru Menteng, the world’s largest orangutan rescue and care center. You can support the center by… more…
September 23, 2020
BOS Foundation: The Amazing Story of Nobri
Text by: Andrea Knox, BOS Foundation Communications and Research Advisor September 23, 2020 — On May 30, 2001 an 8-year-old orangutan entered the Nyaru Menteng… more…
September 10, 2020
BOS Foundation: What a lovely surprise!
Text by: BOS Foundation Communication Team September 10, 2020 — In Forest School, the orangutans form close bonds with their surrogate mothers and babysitters, and… more…
August 26, 2020
BOS Foundation: Meet Super-Focused Napri the Orangutan
Text by: BOS Foundation Communications Team at Nyaru Menteng August 26, 2020 — Orangutans, much like their human relatives, each have their own unique personalities.… more…
August 26, 2020
Bong the Orangutan Bonding in the Forest!
Text by: PRM Team in Camp Lesik, Kehje Sewen Forest August 2020 — Camp Lesik, in the northern part of the Kehje Sewen Forest, East… more…
August 19, 2020
Video– International Orangutan Day: Conservation Conversation
Please take a few minutes to watch this thoughtful discussion with Orangutan Outreach founder, Richard Zimmerman. Learn about all the work Orangutan Outreach is doing… more…
August 5, 2020
BOS Samboja Lestari: Island 8 is Abuzz with Activity
Text by: BOS Foundation Communication Team August 5, 2020 — Early in 2019, the orangutans on Pre-Release Island #8 at the Samboja Lestari Orangutan Rehabilitation… more…
July 22, 2020
BOSF: Baby Jacqui Throws a Temper Tantrum
Text by: BOS Foundation Communication Team July 22, 2020 — Our dedicated surrogate mothers have many interesting stories to tell about the orangutans they care… more…
July 15, 2020
Messi: Born to Be Wild
Text by: Melki Deus Purba, PRM Team Camp Coordinator in Batikap July 15, 2020 — “Stop! There’s one at the top of that tree”, I… more…
July 13, 2020
BOS Foundation: Meet Brave Little Marlon
Text by: BOS Foundation Communication Team at Samboja Lestari July 13, 2020 — In November 2015, a baby orangutan was born on Island #3 at… more…
July 10, 2020
Video: Mud Yoga With Yutris the Orangutan
Yutris is being cared for at BOS Nyaru Menteng in Borneo, Indonesia. He is one of the stars of the series Orangutan Jungle School. He… more…
July 10, 2020
Video: BOS Foundation: Covid-19 Update
July 2020 — The BOS Foundation is now in its fourth month since it closed its rehabilitation centers to visitors, due to the global… more…
July 9, 2020
BOS Nyaru Menteng: The Story of Best Friends Rambo and Uwai
Text by: BOS Foundation Communication Team in Nyaru Menteng July 8, 2020 — Orangutans share 97% of their DNA with humans, making them one of… more…
July 7, 2020
Noni and Dodo’s Summer Update
Noni and Dodo are a lovely orangutan pair who are being cared for at the Cikananga Wildlife Center on Java Island. They were rescued… more…
June 24, 2020
Orangutan Outreach Now Accepts Cryptocurrency Donations
Orangutan Outreach has taken a giant leap forward in fundraising and is now able to accept tax-deductible donations in the following cryptocurrencies via The… more…
June 10, 2020
BOSF Orangutan Jungle School: A Small Enemy with a Big Bite!
Text by: BOS Foundation Communication Team June 10, 2020 — Orangutans share 97% of the same DNA as us, and often display behaviours similar to… more…
June 4, 2020
BOSF Orangutan Jungle School: A Muddy Memory
Text by: Dessi Sidabutar, Surrogate Mother at BOS Nyaru Menteng June 3, 2020 — Being a part of the BOS Foundation team certainly has it… more…
May 13, 2020
BOS Foundation: Kopral is Now Living on an Island!
Text by: BOS Foundation Communication Team May 13, 2020 — Who could forget Kopral, the armless male orangutan who ‘ruled’ over Forest School Group… more…
May 6, 2020
BOSF Orangutan Releases: Vista, A Model Mother
Text by: Vivi Dwi Santi, Veterinarian in BOS Nyaru Menteng, Central Kalimantan May 6, 2020 — In March, a Post-Release Monitoring (PRM) technician from the… more…
May 1, 2020
BOS Foundation: “Unreleasable” Orangutans
Text by: BOS Foundation Communication Team May 1, 2020 — At our orangutan rehabilitation centers, we continue to prepare hundreds of rescued orangutans for release… more…
April 29, 2020
BOS Foundation: Post Release Monitoring Team Still Busy in the Forest
Text by: BOS Foundation Communication Team Please support the BOSF Emergency Covid-19 Relief Fund April 8, 2020 — It has been almost six weeks since… more…
April 29, 2020
BOS Foundation: Handsome Kisar Living in Paradise
Text by: Jack Lammas, BOSF Post Release Monitoring Volunteer at Camp Totat Jalu, Bukit Batikap Protection Forest April 29, 2020 — It was 4:00 am… more…
April 29, 2020
New Video: Meet Baby Brenda
On the 12th of March 2019, a nearly 4-month-old orangutan baby was brought into the SOCP rescue and rehabilitation center by local authorities. The… more…
March 20, 2020
URGENT: BOS Foundation & Covid-19
Official statement by the BOS Foundation 20 March 2020 Dear Orangutan Friends, On March 11, 2020, the World Health Organization (WHO) declared the new coronavirus,… more…
March 19, 2020
BOS Nyaru Menteng: Three Rescued Babies Doing Well
Text by: BOS Foundation Communication team March 18, 2020 — Late last year, the Borneo Orangutan Survival (BOS) Foundation rescued baby orangutans Monyo, Niniek and… more…
March 4, 2020
BOS Samboja Lestari: Latest Update on Jeffrey!
Text by: BOS Foundation Communication Team March 4, 2020 — Do you remember Jeffrey? He was undergoing rehabilitation at the Samboja Lestari Orangutan Rehabilitation Centre,… more…
February 28, 2020
BOS Foundation Press Release: Alba, the Albino Orangutan, Thrives in Forest Home
February 28, 2020 — Jakarta, Ministry of Environment and Forestry (KLHK), Friday, 28 February 2020 – The Directorate of Biodiversity Conservation (KKH), the Bukit Baka… more…
February 26, 2020
Monti Goes Wild!
A success story 10 years in the making In August 2009 Orangutan Outreach teamed up with the world-renowned British charity International Animal Rescue to help… more…
February 20, 2020
BOS Foundation Press Release: 35th Orangutan Release
February 19, 2020 — BOS Nyaru Menteng, Central Kalimantan, 19 February, 2020. The Directorate of Biodiversity Conservation, the Bukit Baka Bukit Raya National Park (TNBBBR)… more…
February 20, 2020
Meet Hanni: Orangutan Warrior #1
Text by: BOS Foundation Communication Team February 20, 2020 — Established in 1991, the Borneo Orangutan Survival (BOS) Foundation has remained true to its initial… more…
February 15, 2020
BOS Nyaru Menteng: Candidate Profiles for the 35th Orangutan Release
Text by BOSF Communications Team February 14, 2020 — In the second release of the new year three lucky orangutans from BOS Nyaru Menteng are… more…
February 13, 2020
BOS Nyaru Menteng: The First Baby Orangutan Rescue of 2020
Text by: The BOS Foundation Communication Team February 13, 2020 — A joint team from the Borneo Orangutan Survival (BOS) Foundation and the Central Kalimantan… more…
January 29, 2020
BOS Samboja Lestari: New Year, New Class!
Text by: BOS Foundation Communication Team January 29, 2020 — The new year is off to a good start for many of our Forest School… more…
January 21, 2020
First BOSF Release of 2020: Three Orangutans Returned to Forest
Text by: BOS Foundation Communication Team January 21, 2020 — Starting the new year with new hope, BOS Foundation has released three more rehabilitated orangutans… more…
January 15, 2020
BOS Nyaru Menteng: Candidate Profiles for the 34th Orangutan Release
January 20, 2020 — In the first release of the new year three lucky orangutans from BOS Nyaru Menteng are being released back into the… more…
January 10, 2020
BOS Nyaru Menteng: New Year, New Class!
Text by: BOS Foundation Communication Team January 10, 2020 — The beginning of a new year is the perfect time to start something new. This… more…
December 18, 2019
BOS Foundation: In the Final Release of 2019, 11 More Orangutans Return to The Wild
Text by: BOS Foundation Communication Team December 18, 2019 — Closing the year on a high note, the BOS Foundation has released nine more rehabilitated… more…
December 17, 2019
BOS Orangutan Releases: Moms’ Day Out in the Forest!
Text by: PRM Team in Lesik Camp, Kehje Sewen Forest December 17, 2019 — Most mothers, humans and orangutans alike, experience a similar predicament once… more…
December 17, 2019
BOS Orangutan Releases: Check Out These Nests!
Text by: PRM Team in Nles Mamse Camp, Kehje Sewen Forest. December 17, 2019 — The orangutans we reintroduce to the wild are tracked by… more…
December 15, 2019
BOS Nyaru Menteng: Candidate Profiles for the 33rd Orangutan Release
December 14, 2019 — Eleven lucky orangutans from BOS Nyaru Menteng— including three mother-baby pairs and two wild adult males— are being released back into… more…
December 6, 2019
BOS Nyaru Menteng Baby Update: Bumi the Brave!
Text by: BOS Foundation Communication Team December 6, 2019 — The majority of orangutans that we take in at our rehabilitation centres arrive in a… more…
December 5, 2019
BOS Orangutan Releases: New Home for 3 More Orangutans
Titon the Magnificent Text by: BOS PRM Team in Nles Mamse Camp, Kehje Sewen Forest December 5, 2019 — The BOS Foundation, in collaboration with… more…
December 5, 2019
BOS Orangutan Releases: Cheekpadders Titon and Agus
Text by: BOS PRM Team in Nles Mamse Camp, Kehje Sewen Forest December 5, 2019 — It has been just over a fortnight since mother… more…
December 5, 2019
BOS Samboja Releases: One Encounter, Four Orangutans
Text by: BOS PRM Team in Nles Mamse Camp, Kehje Sewen Forest Dec 5, 2019 — As the year winds down, the BOS Post-Release Monitoring… more…
December 5, 2019
BOS Foundation Releases Another 17 Orangutans in National Park
Text by: BOS Foundation Communication Team December 5, 2019 — The Borneo Orangutan Survival (BOS) Foundation, in collaboration with the Central Kalimantan BKSDA, the Bukit… more…
November 18, 2019
BOSF Orangutan Releases: Mother-Son Orangutan Pair Regain Forest Freedom!
Text by: BOS Foundation Communications Team November 18, 2019 — Do you remember mother-infant pair, Jubaedah and Jubaedi, who were rescued several months ago? Jubaedah… more…
November 18, 2019
BOS Nyaru Menteng: Candidate Profiles for the 32nd Orangutan Release
November 18, 2019 — Eighteen lucky orangutans from BOS Nyaru Menteng— including one mother-baby pair— are being released back into the forest! Meet the candidates!… more…
November 12, 2019
BOS Samboja Lestari – 23rd Orangutan Release: Meet the Candidates!
Text by BOSF Communications Team November 12, 2019 — The Borneo Orangutan Survival (BOS) Foundation and the East Kalimantan Natural Resources Conservation Agency (BKSDA) are… more…
October 30, 2019
BOSF Orangutan Releases: Hamzah on a Mission
October 30, 2019 — After three full months of balancing orangutan release-related activities with ongoing orangutan behavioural monitoring, our Post-Release Monitoring (PRM) team from Lesik… more…
October 30, 2019
BOSF Orangutan Releases: Garu the Guardian
Text by: Melki Deus Purba, PRM Coordinator in Totat Jalu Camp, Bukit Batikap Protection Forest October 30, 2019 — “Stop over there, bro,” I directed… more…
October 23, 2019
BOSF Orangutan Releases: Elder Loves Her Smelly Fruit
Text by: BOS Foundation PRM Team at Nles Mamse Camp, Kehje Sewen Forest OCTOBER 23, 2019 — Every orangutan will follow their unique path as… more…
October 21, 2019
BOS Nyaru Menteng Baby Update: Little Alejandra Taking Big Steps in Forest School
Text by: BOS Foundation Communication Team October 21, 2019 — The first time we met Alejandra was when she was rescued by a joint team… more…
October 17, 2019
BOS Nyaru Menteng: 8 More Orangutans Released into National Park
Text by: BOS Foundation Communication Team October 17, 2019 — Despite our extensive experience in carrying out orangutan reintroductions, the Borneo Orangutan Survival Foundation (BOS)… more…
October 16, 2019
BOS Nyaru Menteng: Candidate Profiles for the 31st Orangutan Release
October 16, 2019 — Eight more lucky orangutans from BOS Nyaru Menteng are being released back into the forest! Meet the candidates! Good luck everyone!… more…
October 16, 2019
BOSF Orangutan Releases: Mother-Daughter Pair, Riki and Rini, Meet the King of the Forest
Text by: PRM team at Nles Mamse Camp, Kehje Sewen Forest October 16, 2019 — Recently, our Post-Release Monitoring (PRM) team from Nles Mamse Camp,… more…
October 1, 2019
22nd Orangutan Release from BOS Samboja Lestari: Meet the Candidates!
The Borneo Orangutan Survival (BOS) Foundation and the East Kalimantan Natural Resources Conservation Agency (BKSDA) are conducting a fifth release for 2019 in the Kehje… more…
September 30, 2019
BORNEO IS BURNING! The Orangutans Need Your Help!
FIRES ARE WREAKING HAVOC ALL ACROSS BORNEO! AND THE ORANGUTANS DON’T HAVE THE LUXURY OF LEAVING! Palm oil companies and small land holders are… more…
September 30, 2019
BOSF Orangutan Releases: Manisha Makes a Marvelous Mother!
Text by: Melki Deus Purba, PRM Coordinator in Totat Jalu Camp, Bukit Batikap Protection Forest September 30, 2019 — Since 2012, numerous births have been… more…
September 24, 2019
BOSF Orangutan Releases: Berani, Living Up to His Name, Grows Braver by the Day!
Text by: BOS Foundation PRM Team in Nles Mamse, Kehje Sewen Forest September 24, 2019 — It was a beautiful Saturday morning when our Post-Release… more…
September 24, 2019
BOSF Orangutan Releases: Slowly but Surely, Febri Adapts to Life in Kehje Sewen
Text by: BOS Foundation PRM team at Nles Mamse Camp, Kehje Sewen Forest September 24, 2019 — Following the latest BOS Foundation orangutan release conducted… more…
September 9, 2019
BOS Foundation Releases Another 8 Orangutans to National Park
Text by: BOS Foundation Communication Team September 9, 2019 — Rehabilitated orangutan releases are in full swing here in Indonesia, as The Borneo Orangutan Survival… more…
September 4, 2019
BOSF Orangutan Releases: Adventure Awaits Misri and Friends in the Kehje Sewen Forest
Text by: BOS Foundation PRM Team in Nles Mamse, Kehje Sewen Forest Sept 4, 2019 — On 27 August 2019, the BOS Foundation released four… more…
September 4, 2019
BOS Foundation: Orangutan Family Returns to their Wild Home
Text by: BOS Foundation Communication Team Sept 4, 2019 — Following the successful release of 24 orangutans to natural forests in the first half of… more…
September 3, 2019
BOS Nyaru Menteng: Candidate Profiles for the 30th Orangutan Release
September 3, 2019 — Eight more lucky orangutans from BOS Nyaru Menteng are being released back into the forest! Meet the candidates! Stay tuned for… more…
August 27, 2019
BOS Orangutan Releases: Justin’s Persistence Finally Pays Off
Text by: BOS Foundation PRM team in Nles Mamse Camp, Kehje Sewen Forest AUGUST 27, 2019 — Last week, our Post-Release Monitoring (PRM) team from… more…
August 26, 2019
21st Orangutan Release from BOS Samboja Lestari: Meet the Candidates
The Borneo Orangutan Survival (BOS) Foundation and the East Kalimantan Natural Resources Conservation Agency (BKSDA) are conducting a fourth release for 2019 in the Kehje… more…
August 22, 2019
BOS Orangutan Releases: Justin Makes a Move on Anna Friel
Text by: BOS Foundation PRM team in Nles Mamse Camp, Kehje Sewen Forest August 22, 2019 — Our Post-Release Monitoring (PRM) team from Nles Mamse… more…
August 22, 2019
BOS Orangutan Releases: Elder and Her Obsession
Text by: PRM team in Kehje Sewen Forest August 22, 2019 — With 97% of the same DNA as humans, it is no surprise that… more…
August 12, 2019
Emergency Fire Fund — BORNEO IS BURNING!
It’s fire season again and Borneo is burning. Palm oil companies, farmers and small land holders are setting fires that are burning out of control.… more…
August 8, 2019
New Children’s Book Supporting Orangutan Outreach: The Big Old Rambutan Tree
Award-winning children’s book authors Kathy and Peter Creamer are committed to help with the conservation of orangutans. The thought of orangutans disappearing from the face… more…
August 7, 2019
BOS Foundation: New Release Site Ensures Optimum Orangutan Distribution in Forest
Text by: BOS Foundation Communication Team August 7, 2019 — Since its establishment in 1991, the Borneo Orangutan Survival (BOS) Foundation has remained committed to… more…
August 7, 2019
BOSF Orangutan Releases: Komo and Petak Enjoy Romance in the Wild
Text by: BOS Foundation PRM team in Camp Lesik, Kehje Sewen Forest AUGUST 5, 2019 — Komo and Petak were both rescued from captivity, and… more…
August 1, 2019
BOS Nyaru Menteng: Candidate Profiles for the 29th Orangutan Release
August 1, 2019 — In commemoration of World Nature Conservation Day, which falls annually on 28 July, eight rehabilitated orangutans will be returned to their… more…
July 31, 2019
BOSF Orangutan Releases: The Return of Mona
Text by: BOS Foundation PRM team in Camp Lesik, Kehje Sewen Forest July 31, 2019 — Recently, our post-release monitoring (PRM) team from Camp Lesik –… more…
July 26, 2019
20th Orangutan Release from BOS Samboja Lestari: Meet the Candidates
July 26, 2019 — Another group of rehabilitated orangutans will be reintroduced to the forest in a collaborative effort between the Borneo Orangutan Survival (BOS)… more…
July 26, 2019
BOS Nyaru Menteng: Meet Rachel, a Model Forest School Student
Text by: Communication Team BOS Foundation July 26, 2019 — On 23 December, 2017, a 2-year-old baby orangutan arrived at the BOS Foundation’s Nyaru Menteng… more…
July 25, 2019
BOS Foundation: Released Orangutans Komo and Friends Settle into Forest Life
Text by: PRM Team in Camp Lesik, Kehje Sewen Forest 25 July 2019 — Releasing orangutans back into the forest is not the end of… more…
July 25, 2019
BOS Foundation: 6 More Orangutans Released into the Kehje Sewen Forest!
Text by: BOS Foundation Communication Team 25 July 2019 — The Borneo Orangutan Survival (BOS) Foundation, in cooperation with the East Kalimantan BKSDA, has… more…
July 25, 2019
BOS Foundation: A Second Chance for Four Young Orangutan Orphans
Text by: BOS Foundation Communication Team 25 July 2019 — In 2016, the International Union for Conservation of Nature (IUCN) – an international union comprised… more…
June 28, 2019
SOCP Press Release: Three Infant Sumatran Orangutans Confiscated from Smugglers
(All photos © 2019 Ariesta Ketaren SOCP/YEL. Click on the thumbnail to see the full image.) PRESS RELEASE Three infant orangutans confiscated during smuggling attempt… more…
June 25, 2019
Press Release: Orangutan Jungle School to Make US Premiere in August
NEW SERIES FOLLOWING THE EDUCATION OF ORPHANED ORANGUTANS AVAILABLE TO STREAM FRIDAY, AUGUST 2 ON SMITHSONIAN CHANNEL PLUS NEW YORK – June 25, 2019 –… more…
June 24, 2019
Release Candidate Profiles for the 18th Orangutan Release from BOS Samboja Lestari
24 June, 2019 — Text by the BOS Foundation Communications Team The BOS Foundation is preparing to release four more orangutans from the Samboja Lestari… more…
June 21, 2019
BOSF Releases: Justin’s Jungle Jaunt
Text by: BOSF PRM Team at Nles Mamse Camp, Kehje Sewen Forest 19 June 2019 — The warmth of morning sunshine was a welcome change… more…
June 14, 2019
BOSF Releases: Four Rehabilitated Orangutans Meet in the Forest
Above: Leonie, Signe, Bungaran Text by: PRM team in Nles Mamse Camp, Kehje Sewen Forest June 10, 2019 — On a cold morning in the… more…
May 29, 2019
BOSF Orangutan Releases: Cilik Fights for Gina’s Attention
Text by: Vivi Dwi Santi, Vet from Nyaru Menteng, Bukit Batikap Protection Forest May 29, 2019 — Found in the forests of Kalimantan and Sumatra,… more…
May 15, 2019
BOSF Orangutan Releases: Cindy Helps Regenerate Wild Population With Third Birth!
Text by: Danielle Sorrell, PRM Team Coordinator in Totat Jalu Camp, Bukit Batikap Conservation Forest May 15, 2019 — The ongoing decline in Bornean orangutan… more…
May 9, 2019
BOSF Orangutan Releases: Nobri Recovers, Returns to Forest
Text by: PRM Team at Camp Totat Jalu, Bukit Batikap Protection Forest May 9, 2019 — For the past two and a half months, our… more…
May 9, 2019
Orangutan Outreach Spring 2019 Newsletter
Mother’s Day is the perfect day to celebrate and honor orangutan mothers. Our M.O.M. – Missing Orangutan Mothers Campaign helps bring attention to all the… more…
May 6, 2019
Podcast: Saving Animals with Blank Park Zoo
Orangutan Outreach Executive Director Richard Zimmerman was recently featured on the conservation-themed podcast Saving Animals with Blank Park Zoo. He spoke with host Jessie Lowry… more…
May 2, 2019
BOSF Releases: Mystery Orangutans Identified!
Text by: Danielle Sorrell, PRM Coordinator, Totat Jalu Camp, Bukit Batikap Protection Forest May 2, 2019 — A trio of rambunctious orangutans recently showed up… more…
April 30, 2019
BOS Orangutan Releases: Catching Up with Signe, Bungaran and Bong
Text by: PRM team in Nles Mamse Camp, Kehje Sewen Forest APRIL 30, 2019 — Our Post-Release Monitoring (PRM) team from Nles Mamse Camp, in… more…
April 25, 2019
Orangutan Outreach joins Leonardo DiCaprio Foundation’s “Global Deal for Nature” campaign
Orangutan Outreach is proud to endorse the Leonardo DiCaprio Foundation’s One Earth initiative and support the Global Deal for Nature campaign. BIODIVERSITY AT RISK In… more…
April 24, 2019
Serendipity: Orangutans and the Passing of Luke Perry
We are honored to have received a donation in memory of the late actor Luke Perry. When the Beverly Hills 90210 superstar passed away in… more…
April 24, 2019
BOSF Releases: Mystery Orangutans Confuse PRM Team
Text by: Danielle Sorrell, PRM Coordinator, Totat Jalu Camp, Bukit Batikap Protection Forest April 24, 2019 — On a quiet Tuesday afternoon, myself and the… more…
April 15, 2019
BOSF Orangutan Releases: Julien is Back!
Text by: PRM team in Nles Mamse Camp, Kehje Sewen Forest APRIL 15, 2019 — Last week, our Post-Release Monitoring (PRM) team from Nles Mamse… more…
April 12, 2019
BOS Foundation: Zakia Enjoys Her Own Company
Text by: Danielle Sorrell, PRM Coordinator at Camp Totat Jalu, Bukit Batikap Protection Forest April 10, 2019 — One recent, sunny morning in the Bukit… more…
April 8, 2019
Long Calls: The King of the Forest is Coming!
Text by: PRM team in Nles Mamse Camp, Kehje Sewen Forest A ‘long call’ is a distinct sound that an adult male orangutan produces to… more…