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Infographics on the EIA

March for MacRitchie ended on a good note last week, with people sharing about the aspects of MacRitchie that they like and have fallen in love with. To follow up with all that has happened, here’s a post reminding us on the importance of MacRitchie and what we can lose with the construction of the Cross Island Line. If you are not familiar with the Cross Island Line issue, you can read our summary over here first.

Now, we all know that MacRitchie is a key area for Singapore’s biodiversity with many of its areas, including those being surveyed during the site investigation, having important ecological values. With over 2000 plants species and 347 species of animals, this area of high biodiversity is considered to be important for conservation.  However, the Central Catchment Nature Reserve (that MacRitchie is a part of) faces fragmentation pressures and stressors from human use and developmental works. Fragmentation, the break-up of contiguous land masses, limits wildlife movement and compromises the fitness of individuals. Any additional stresses or threats may affect the wildlife and hence the health of their future generations, as well as genetic variability of small populations. In view of this ecological baseline of MacRitchie and the Nature Reserve, an Environmental Impact Assessment (EIA) was done to highlight the potential impacts arising from soil investigation works and what can be done to mitigate such impacts.

However, we know that reading through the lengthy EIA can be tiring. So here’s some bite size infographics focusing on the EIA’s main findings in volume III, as a continuation of our previous “EIA101: All you need to know!“.  

1. Soil investigation

2. EIA Infographics_noise

EIA Infographic (Water Quality)

While the mitigation measures are comprehensive, here’s a thought from the monkeys:

EIA Infographic (Future Considerations)

We hope these infographics have been useful to gain a better understanding of what the soil investigations are and what impacts and mitigation efforts they entail. Hopefully, this can help you in developing a more informed standing in this issue as well. Now, if you’ll like to help save our MacRitchie forest, here’s two simple steps that you can take: Spread the word about the issue and sign the petition to re-route the line around the forest! You can also share our infographics about volume III of our EIA on Facebook here.

Last but not least, we will like to acknowledge the following individuals/organisations for their invaluable contribution: Main graphics by Rachel Lee, Jacqueline for her amazing pixelated animals drawings, Lahiru and the Love Our MacRitchie Forest team for feedbacks and ideas on the EIA, Chope for Nature for allowing us to use their summary as reference, and last but not least, a big thank you to all of you for supporting our MacRitchie forest!! 🙂 

The Story of Saving Macritchie So Far

Recently, I’ve seen Facebook posts about the Cross Island Line on my newsfeed posted by those outside of my usual echo chamber of environmentally-conscious, nature-loving friends. The Cross Island Line debacle has finally surfaced into mainstream public consciousness. People are talking about the impacts of building an MRT line through a forest our city in a garden. This comes almost two years after it was first announced as part of the 2013 Population White Paper, which led to lively but unsustained conversations about it. A petition started by a concerned individual began to garner signatures. It was discussed at the Singapore Future Sustainability Symposium. Nature groups conducting walks in Macritchie Forest drew attention to the matter by incorporating it in their guide notes. An alternate route was proposed by Nature Society Singapore in a position paper submitted to the government.


What’s changed now? The debate has grown to include interwoven perspectives about our (under)valued biodiversity and natural heritage, treasures for the next generation, benefits of connectivity, difficult questions about development versus preservation, fissured environmental laws, and lessons in stakeholder engagement.

This is in response to the newly-released environmental impact assessment (EIA) report solely on the environmental baseline and soil investigation works that are required for future construction of the line. Notably, this is the first phase of the EIA, upstream of a future study that will assess the construction and operation of the underground train tunnels.

This EIA report has over 1,000 pages and 7 chapters, and is available for viewing at LTA by appointment only. There are no digital copies, making details about the EIA vaguely translated at best – a defensive move given the lack of legal requirement for EIAs to even be produced, much less open to public scrutiny. Information here on the EIA have been personally noted, and I take responsibility for any inaccuracies. [Update 19/2/2016: The LTA has now released the EIA online in full for public viewing here, a move made after the lack of transparency was raised in a letter to the Straits Times.]

The time is ripe for a decision by LTA to select one of two viable options proposed in the report:

Option 1 (Green): 1.8km route cuts across Macritchie/CCNR from the Singapore Island Cross Country Club to the Pan Island Expressway (PIE)

Option 2 (Blue): 9km route skirts around it Macritchie/CCNR from the southeast of SICC, beneath to Lornie Road and parallel to the PIE


The engineering feasibility of the Cross Island Line likely depends on soil investigation works to map out the geology of the area for both options. For Option 1, the train tunnel ought to go through Bukit Timah Granite for structural stability, and this is the reason why 16 boreholes (instead of 72 originally planned) will be drilled 50-70m underground for analysis.

Importantly, the EIA studied the impacts of soil investigation works on surface water quality (groundwater quality was studied without intrusive testing), ambient noise, vibration, ambient air quality, and ecology and biodiversity.

Option 1 presents particular concerns. Even though a rather robust Environmental Mitigation and Monitoring Programme has been recommended to reduce almost all impacts to acceptable levels of minor to moderate or negligible, there still remains the possibility of accidental events . Uncontrolled site runoff, spills from construction fluids, roadkill and damage to vegetation from vehicle movement could all occur – the likelihood of which could fluctuate based on how well measures are observed.

The language of the EIA has diffused into media reports, with words like impact receiving attention. Translated from the Impact Significance Matrix, impact is a composite of sensitivity/vulnerability/importance of receptor/response and magnitude of impact (with factors of extent, duration, scale and frequency). Typically, we want to minimise impact to minor or negligible, especially if they are in highly sensitive areas such as areas directly within the reserve. The type and likelihood of impact is also important. The phrase “as low as reasonably practicable”, stylised as ALARP, is also mentioned as a caveat to the limits of engineering ingenuity, standards, protocols and emergency action plans to reduce these impacts.

Share this comic by Jacqueline Chua here

The construction of a Cross Island Line is one that has particular pressure points which lie outside the scope of the EIA report:

  1. Macritchie / CCNR is the largest nature reserve in Singapore. While it is gazetted by law, it has not been accorded blanket protection.
  2. The biodiversity and habitats found in Macritchie are unparalleled and scarce. Flora and fauna species are already endangered and cannot be found elsewhere, while the high urban cover of Singapore has reduced primary and secondary forests to these few remaining patches in our nature reserves.
  3. The costs of picking Option 2, the route that skirts around the reserve, have not been clarified by LTA yet.

A concerted move by environmental groups to push for a “zero-impact policy as a starting point to avoid long-lasting impacts on the environment” is making itself visible and vocal on social media platforms, garnering support from the masses with each share and like. The Love Our Macritchie Forest movement, fronted by the Toddycats, the BES Drongosand the Herpetological Society of Singapore, is putting pedal to the metal – or in this case, boots on the ground.


March for Macritchie is a series of guided tours in March initiated by Love Our Macritchie Forest that the general public can sign up for – and decide for themselves the values that they place on biodiversity intrinsically, as educational tools, or for wonder to be experienced by themselves or their children.

“You can’t miss what you don’t know.”

This slogan captures precisely the motivations for me to be part of the Love Macritchie movement. You can’t miss what you don’t know about the local biodiversity housed in our forests – a part of our terrestrial environment that still remains audaciously non-urbanised. And you won’t miss it until it’s gone. (Pictured here are some of the animals found in Macritchie.)


Such is the impassioned, heartfelt plea from environmentalists such as myself to not only minimise the impact of the Cross Island Line, but to reduce the impact to zero. This is not unachievable, given the fact that there is after all, literally another option on the table present as a thinner (and hence detailing fewer impacts) bound report: the alternate Lornie Road route, Option 2.

Words by: Judy Goh

EDIT: The EIA has now been made available for viewing online here!

Monkeying Around: Misconceptions about Macaques and how we can make it better

Hi everyone! Unless you’ve been living under a rock, you’d know that Chinese New Year is just around the corner and this year happens to be the Year of the Monkey!


Generally, people think that monkeys are adorable, curious, and highly intelligent animals – which is not untrue. However, if you’ve ever been on our guided walks or to MacRitchie Reservoir Park at all, you might have seen people scream and run away at the sight of the monkeys.

This is not without reason: the monkeys at MacRitchie have been known to snatch people’s food, bottles, and bags. Though, what people don’t know is that we created these human-macaque conflicts ourselves and all that’s required to resolve it is a simple change in behaviour. But, let’s start from the top to catch everyone up to speed 🙂

About the monkeys

The monkeys at MacRitchie are called long-tailed macaques (Macaca fascicularis) and they are a forest-edge species. What this means is that rather than living deep in the forest, the macaques prefer to live at the edge of the forest, which coincides with the parks and paths that we use for our leisure.

Clarifying misperceptions

  1. “The macaques are aggressive and scary.”

Firstly, it is important to differentiate between aggressive and assertive. Aggressive behaviour includes biting and scratching, while assertive behaviour refers to the baring of teeth, chasing, lunging and/or grabbing. The macaques at MacRitchie are usually assertive and have in fact rarely been observed to be aggressive.

Secondly, whether the macaque is being assertive or aggressive, it is all part of their natural behaviour. Visitors to MacRitchie might have noticed that the macaques often travel in groups. This is their troop. In each troop, there is an alpha male – equivalent to the ‘dad’ of the group, and it is his responsibility to care for and protect his troop. As such, when people or dogs get too close to his family members, it is the alpha male’s instinct to display assertive and/or aggressive behaviours.

  1. “The macaques are attracted only to red plastic bags.”

This is a strange myth and how it started remains a mystery. What we do know is that the macaques are in reality attracted not only to plastic bags of all colours, but also to any bag that is handheld (e.g. reusable bag, shoe bag, tote bag, even backpacks). Even when there is no food present, the very image of a bag carried by its handles and held in a hand results in the macaque associating the bag with food.

  1. “The macaques are relocated when complaints are made about them.”

Many think that when people call AVA or NParks to complain about the macaques being a nuisance in the park, the macaques will then be relocated to another forest patch or the zoo. This isn’t a method employed by AVA or NParks in dealing with complaints as relocating the macaques is simply relocating the problem.

When someone makes a complaint against the macaques, the problem macaque, when identified, is actually culled, or killed. Sometimes, when the problem macaque cannot be identified, more macaques are culled 😦

It is important to be aware of the consequences your complaint might have so that you complain responsibly. Save your complaints for problems that you can’t solve. With that in mind, here are some ways in which you can help play a part in resolving the human-macaque conflict.

Resolving conflict

  1. Be prepared

Imagine this: A macaque approaches and attempts to grab something from you, you scream and run. The macaque gives chase and refuses to give up. In the end, you decide to simply get rid of the monkey by giving it what it wants – throwing your food/bottle/bag at it so it will finally stop pestering you.

The above scenario is one that has been commonly observed. The macaques are smart and they learn from experience. Such submissive human behaviour teaches the monkeys that they are able to easily obtain food. It also results in them associating humans with food, which will only prompt them to approach humans more often and more aggressively.

A study in 2014 (Lai) showed that by simply changing your reaction towards macaques, the macaques will respond submissively and not attempt to grab your items. Some simple acts of deterrence include:

  • Making loud noises at the macaque
  • Making threatening gestures using tools such as umbrellas or sticks (or even your hands)
  • Stomping your feet.
  1. Avoid conflict altogether

Very simply, this means removing the exposure of any items that might trigger a macaque into initiating interaction with you. Such items include:

  • Food
  • Other food-associated items
    • Bottles
    • Plastic bags of any colour
    • Any hand-held bags (be it tote bags, shoe bags, drawstring bags, backpacks, etc.)

It is encouraged that you do not bring food anywhere near the forest, especially on trails, and when consuming food, please clear your trash responsibly.

In summary

  1. Macaques are simply exhibiting their natural behaviour
  2. It is within our power to help resolve the human-macaque conflict
  3. Make loud noises, threatening gestures, or stomp to prevent the macaque from approaching you and/or grabbing your things
  4. Don’t expose any food or food-related items when in the park and/or near the macaques

Ultimately, MacRitchie is our park, but it is also where the macaques live. They too have a family, and they too need a home. It’s been their home long before it was our park, so let’s all play a part in helping both species to coexist by being more understanding and tolerant towards the macaques 🙂

Words by: Tan Jia Xiu

EIA (Phase 1) of CRL announced: where do we go from here?

On 5th February 2016, Phase 1 of the Environmental Impact Assessment (EIA) was announced by the Land Transport Authority (LTA). The report concluded that:

  1. Site investigation works will have moderate impact on the environment, if mitigating measures are taken.
  2. As such, soil testing will still go ahead.

Soil testing works involves deep drilling into the ground of the forest, and is done to determine the soil composition of the potential construction site of the Cross Island Line (CRL), as part of risk assessment protocol.

While we, the BES Drongos and other concerned individuals from the Love Our MacRitchie Forest movement have been hoping for the forest to be left undisturbed, the fact remains that drilling will still go ahead.

However, as much as we are disappointed with the EIA outcome, our voices have not been ignored. Following concerns from various nature groups, LTA has decided to:

  • Reduce the number of boreholes from 72 to 16;
  • Confine drilling to public trails and non-vegetative areas; and
  • Employ more non-intrusive (no physical alteration) methods in soil investigation.

Furthermore, an alternative route first suggested by the Nature Society is currently being considered as a viable second option. The suggested route will skirt around the nature reserve instead of cutting directly through it, which means less direct disturbance to the forest ecosystem.

Original route (Green) and proposed alternative route (blue). Image: Today Online

So what can we do? Where do we go from here?

While we can’t reverse the decision made by LTA, if you are concerned about this issue, here’s what you can do to help:

  1. The EIA will be open for public viewing for the next 4 weeks; book an appointment to go down and view it.
  2. Help spread the news and raise awareness! Tell your friends, your family or anyone who you know cares about this. If lots of people go down to view the EIA, it will show LTA how much the public cares.
  3. Voice your support for the alternative route. The alternative route is now our best (and last) bet to reduce significant impacts on the forest.

You can contact LTA [Ms Michelle Chan (email or call 6295 7437)] to view the EIA and give your feedback. Please note that you can view it by appointment ONLY, at Land Transport Authority, 1 Hampshire Road (Blk 11 Level 4, Room 2), Singapore 219428

In addition, to show your support for the alternative route, you can sign the petition here:

The Central Catchment Nature Reserve (CCNR) is home to 400 species of trees, 200 species of birds, 400 species of insects and 150 species of mammals and amphibians. If you’d like to learn more about the biodiversity found in the CCNR, please do sign up for our walks!

For more information on the CRL and CCNR, visit:

Love Our MacRitchie Forest

Straits Times: Measures to lessen impact of MRT works on CCNR



Flock recruitment of BES Volunteers

Photo and design by Jacqueline Chua

To all BES students: For this brand new year, add in “Join nature guiding” to your 2016 resolutions! To be more specific, write “Join BES Drongos for an amazing time with nature and people.”

We are a fun-loving group of volunteer guides keen in spreading the love and passion for nature. We bring members of the public on guided trails in the Central Catchment Nature Reserve to encourage more appreciation of the ecosystems and biodiversity they host.

Over the last six months, we have successfully groomed 7 drongolets on top of holding 7 public walks, and we are looking to have you in our flock!

If you are:

From any cohort of BES

A nature lover

Keen to interact with the public

Passionate about conservation, environmental outreach and education

Interested in honing guiding skills (no prior experience needed)

Able to commit for training sessions (dates TBC)

Willing to guide on weekends for the trails

Not horrified by the idea of guiding about a dozen members of the public through the Petai Trail

Excited to see all sorts of vipers, beetles, birds and plants there are in CCNR (Check out this link of 50 animals you can see in CCNR)

… then we want YOU to join the Drongos!

The participants learning more about the long-tailed macaques from Jacqueline / Photo by Aw Jeanice

If you want to know more, you can read our past posts and email us ( if you have questions burning to be answered.

Can’t wait to join? Sign up HERE by the 17th of January!

If the link doesn’t work, click here:

Love MacRitchie Booth @ NUS FASS

Booth art
Edit: Our booth will end at 5pm, so do come by earlier! Poster design by Aw Jeanice

The Love MacRitchie campaign is a collective effort supported by various nature groups with the aim of spreading the love for MacRitchie and the CCNR.

Head down to the Love MacRitchie booth at the Faculty of Arts and Social Sciences in NUS to learn more about the wonderful biodiversity that dwell within the CCNR!

Date: 2nd & 3rd November 2015

Time: 10 am – 5 pm

See you there!

Pangolin Party

To celebrate World Pangolin Day, the BES Drongos are proud to present a special post on pangolins! (so many P words in one sentence.) So first things first: What the heck is a pangolin?

Copyrighted to Wild Singapore

Pangolins, or scaly anteaters, are probably the weirdest and least understood mammals in our tropical forests today. There are a total of eight species of pangolin that can be found from Africa to Asia, and one species, the Sunda pangolin, can be found in Singapore’s forests, including MacRitchie! Unfortunately, these creatures are nocturnal and are very shy, so the likelihood of seeing one as you walk along the trails is very low. In an odd twist of fate though, pangolins have been known to wander into the residence halls of NTU, much to the confusion of resident students.

Copyrighted to Singapore Post

Looking at this creature, a lot of people think that it is a reptile instead of a mammal. And such sentiments are pretty understandable, seeing as this is the only scaly mammal in the world.The pangolin is covered in rather distinctive overlapping scales, making it look like an artichoke on legs. The scales themselves are made of a material called keratin, which makes up a whole bunch of tough things like our fingernails and rhino horns. These scales have to be tough, as the pangolin uses them to protect itself against predators… by curling into a ball.

pangolin day
Copyright Jac Chua 2015

This is actually a surprisingly effective strategy on the pangolin’s part; it turns out that its scales are so hard, that it can even survive an attack by a hungry lion. In fact, this is such an iconic strategy employed by all pangolins that its name was was derived from the Malayan phrase “Pen Gulling”, which means “Rolling Ball” [1]. Does this sound familiar? Well, it turns out that the pangolin is closely related to the armadillo, who also famously rolls up into a ball to escape danger.

So, if the pangolin rolls up to protect itself, what are those impressive claws on its forelimbs for?

For digging! The pangolin is a great lover of eating ants and termites, and in order to get to its lunch, it has to dig them out. Coupled with its long and sticky tongue, the ants rarely ever stand a chance against the eating machine that the pangolin is. Surprisingly, the pangolin has no teeth, so in order to grind up its dinner it swallows stones to crush its prey within its stomach[2].

Unfortunately for the pangolin, having such large, clumsy claws makes it very hard for it to walk, and as a result pangolins tend to be very slow moving. However, a few species of pangolin, like the Sunda pangolin, have evolved to make the most of it by learning how to climb trees!

Copyrighted to Ecology Asia

Tree-dwelling, or arboreal pnagolins have also evolved to have a prehensile tail, which means that its tail is strong enough to wrap around branches like a fifth limb. This long and muscular tail is also a useful spot for baby pangolins to piggyback on. Baby pangolins, incidentally, are also known as pangopups. Try saying Pangopup Piggybacks on a Pangolin very fast. What a tongue twister!

Copyrighted to Firdia Lisnawati 2014

Unfortunately, it turns out that this wonderful creature is one of the most illegally trafficked in the world. It is a common belief across most of China and Southeast Asia that pangolin meat and scales have medicinal properties for a whole range of ailments from asthma to acne, and as a result they sell for ridiculously high prices on the blackmarket. Even though all pangolin species are protected under CITES (the Convention on International Trade in Endangered Species of Wild Flora and Fauna), which means they cannot be legally traded, entire stretches of Southeast Asian forests have been emptied of this animal, and as a result poachers have turned to Africa to satisfy the demand for pangolin meat and scales here in Asia. In an ironic twist, because pangolin products are becoming so valuable, it has eating pangolins have become akin to a status symbol in certain parts of Asia, driving the demand even higher[3]. Warning; do not click this link if you don’t think you can stomach the sight of pangolin fetus soup.

Copyrighted to National Geographic

So what can we do? Well, for starters, we can all raise awareness about this curious, fantastic animal through social media, and never support the consumption of pangolin products, be they in the form of medicine or food. If you are on holiday and you see pangolins for sale, you can also use the Tangaroa Illegal Wildlife trade reporting app to notify the authorities.

Well, we hope that you have enjoyed this post about pangolins as much as we enjoyed writing it! If you are interested in finding out more about pangolins, please visit our friends over at The Pangolin Story to find out about local pangolin conservation efforts, and check out Save Pangolins for even more resources. Together, we all can save the precious pangolin from peril too!


  1. Chakkaravarthy Q. A. (2012) Research and Conservation Needs of the Indian Pangolin (Manis crassicaudata). Proceedings of the Third Seminar on Small Mammal Conservation Issues 2012: 50-55
  2. Forestry administration of Cambodia and Conservation International-Cambodia (2008) Pangolin conservation stakeholders workshop. 8–10.
  3. Chin S.Y and Pantel S. (2008) Pangolin Capture and Trade in Malaysia. Proceedings of the Workshop on Trade and Conservation of Pangolins Native to South and Southeast Asia: 143-160

Words by: Jacqueline Chua