Monday, October 24, 2022

Aerial Warfare in Nature: Bird Battles

 

This exciting series of fighting behaviours occurred during a birding session at Empress Garden. All of us know about aerial warfare from fighter planes in the human world, courtesy of fantastic action films like Top Gun. But do you know about the aerial warfare which takes place daily- amongst the birds around us?

The start of our birding day blessed us with lovely weather- bright sunshine, a mild chill and no sign of rain- a perfect morning for birding! Our first sighting was a bird at the absolute apex of the food chain, a small but impressive predator- the shikra. Donning a sharp, strong beak and sporting a dark slaty shade on its wings, it looked intense. Perched majestically on a tree top, it waited intently to strike its prey. The rose-ringed parakeets on the nearby branch were the target. Sitting peacefully, preening their gorgeous green bodies, these were their last moments of tranquil. The parakeets had spotted the shikra on the nearby branch! Now, the prey was not going to give up without creating a ruckus for the raptor Suddenly, the air was filled with their high-pitched shrieking alarm calls. The parakeets made a quick escape flight to a tree some distance away. This was a haven for them. Just like home alarms warn us of burglars, bird alarm calls alert other birds about predators in their home patch. Soon, these alarm calls also alerted the other avian residents of the trees- mynahs and crows. The parakeets were not alone now! They had backup. We saw 3-4 black avian shadows ascend onto the tree. The plucky crows had made their way to the tree occupied by the Shikra. They had decided to fight fire with fire. Constantly harassing, pecking and following the shikra, they tried to intimidate the bird of prey. The crows made the most of their biggest advantage over the raptor- teamwork and strength in numbers. It was amazing to see a predator being bullied into evasion by sheer persistence and unity.

Crows are one of the most intelligent birds. They’re known for using tools for opening food cans to eat and being able to recognize aggressive human faces. Learning to ward off potential predators would have been child’s play for the crows. The shikra had to shift to a different, unoccupied tree for now.

For now, the prey had defeated the predator. But surely, the second instalment of this aerial battle might take place soon. The Shikra may have an extra weapon up its sleeve in the next battle. In our books, we learn predator versus prey as a battle of two. In nature, situations are more complex and interesting-with multiple species battling it out!

This account is just one of the many enthralling animal fighting encounters happening in the skies around us right in the city.There are so many amazing behaviours going on all around us, we just need to look up!



Photo Gallery(All photos by N.S. Sivasankaran)

1.Shikra making a beeline for tree used by the parakeets







2.Rose-ringed parakeet


3. Crows on their way to chase off the shikra





-Arjit Jere




Tuesday, May 18, 2021

A Wild Adventure in the Nilgiris- A Nature Essay

 Preface-This essay was originally a  submission for VCN essay competition. While this essay has been presented as a single adventure in one day, it is actually an accumulation of multiple exciting encounters over several days.

 The day started with a particularly foggy morning with the mist shrouding any signs of the road. The place was the always picturesque Nilgiris in the Western Ghats. Another day of fieldwork for habitat plots beckoned. A misty December morning, driving 30Km. in the winding Western  Ghats with low visibility! It was not the easiest route! As we neared our site, we had to drive through the narrow forest animal path. The route bisected the mountain at a point so high that the staggered slopes hugged the route on one side and the gaping valley on the other. The marvellous matrix of grass and rolling forests(which looked like faraway green fur)  presented itself in the view- a unique ecosystem like none other -Sholas at its finest-islands of the heavens!

A typical shola patch-a green matrix


The route however was very precarious indeed! One wrong turn and a horrible death awaited! As I went deeper into the forest with my Field Assistant, a raspy rustling sound on the side pierced the chirping of the forest. What was that!? Intrigue and Fear gripped me. As I quickly turned in the direction of the sound, I saw a spatter of yellow with black spots streaking inside the forest from the road. Instantly, the head of the creature reared itself to me, revealing the spine-tingling sight of a leopard!  It all happened so quickly that I froze on the spot. A wave of fear and excitement caught me, as it was the first time I had seen this animal in the wild. Then as I recovered my senses, the adrenaline surged through my veins, and with an instinctive response, I started to turn back. But to our relief, the leopard gave a short growl of warning and disappeared into the understory! We moved on with bated breath deep in the forest this time on foot. Once we started doing our regular work of plant sampling, it was business as usual. But not for long! I heard a grunt and saw a massive black horned shadow in the growth some feet ahead. This meant only one thing in the western ghats- Gaur! The big bovine is usually shy in the wild but can be aggressive when provoked.So, we had to watch our next movement very carefully indeed. I didn't have much experience in such tense situations before,so I looked at my assistant who was well versed in such situations. The gaur was looking straight at us, intent on charging us! Its ears flickered, maybe with irritation with this unwanted intrusion on its territory or maybe just due to the heat. Its menacing horns could deliver a crushing blow to any body part it touched. 

Here is the imposing Gaur,in a more anthropological setting




My mind became blank , my face went pale and my legs seem to be stuck on the ground as panic struck. We had to act fast to be safe! He told me to immediately find a shaded spot on an incline. I managed to find a safe spot in a bamboo bush, hidden away from the site. Sitting there in some fear and some relief I thought, this must be what smaller mammals must be doing when faced with such circumstances too. We were retaining some ancestral habits from the post-cretacious past I suppose!

In Rome do as the Romans Do! After initially trying to search for us, the Gaur finally went along its way. Thankfully, the presence of mind of my field assistant avoided a potentially dangerous situation. But what was I to know that this wouldn't be the only dangerous situation I was going to get stuck into for that day!

 

Now making our way towards the plot, it was a long winding walk as we reached the tea plantations surrounding the plot. I removed my jacket in the sweltering heat. We finally reached the plantation after 15 minutes of a tiring, steep walk.

As we made our way through the plantation and finally reached the forest edge, A chestnut-headed bee-eater whirled in the faraway trees, exploring the trees for signs of its six-legged food, reminding us that the forest was near. A Tickell's Blue flycatcher stood serenely on a tree nearby. As I stooped in the thick canopy I felt a chill. The temperature dropped suddenly as I went inside. The expansive canopy cover was acting as a shield, not permitting the sunlight to pass through to the forest floor. Entering the forest was like going into a dark cave as if the cave roof was a tree canopy. It became even darker as we ventured inside. 

The  forest started becoming darker once we neared the plot


                                        A chestnut-headed bee-eater, a common resident of the Nilgiris

White-bellied sholakili,a shola endemic ,as the name suggests(Photo Credits-Dhanesh,Field Assistant, Nilgiri Ecology Project)


We finally started doing our plot. After completing the one-hectare plot we ventured to the left side of the forest. As we came out of the forest,I saw a sharp transition from the Montane forest to open grassland. Now we had to traverse this steep terrain to reach to the four-hectare plot.

 It was as if we had entered a different world! The chill of the forest now changed to the harsh heat of the scrub. As we trudged up the hill in the scrub I suddenly came across a plant which was going to be a massively pesky nuisance all the way till we reached the four-hectare plot.  There it stood, in numbers, ominously staring at me from the path. “Goddamn gorse” I swore ruefully. Our journey was going to get prickly indeed. I slowly tried going travelling the path, trying to carefully dodge the sharp thorns of the plant so that they won’t pierce my shirt or worse, my skin. But the route was infested with these invasives so however hard I tried the plant still managed to make its mark. As I somehow struggled up the path, a few bloody scratches bore witness to the struggle. But this is normal for field work in the forest!

 Cursing my wounds,I went up to finish the 4-hectare plot and the way was about to get bumpier. To exit the scrub back to the plantations we had on the way down- I took my time to walk down. Then, I  lost sight of my partner going down from the scrub to the dense forest. Somehow, I managed to   “acoustically ‘’ estimate his location downhill by calling out and hearing his responses. Just as I started descending the forest, a  slippery slope beckoned. Suddenly, I  lost balance making the nontrivial mistake of an imbalanced straight step instead of the side step. Down I went, screaming with horror fearing the worst. I needed something to stop my slide, else at the minimum, some fractured bones awaited. I only just managed to stop myself from banging my head on a boulder as I picked up speed.   Thankfully I held on to a grateful branch of a tree to break my fall and didn’t get hurt. Had it not been for this tree, I would have descended many meters down on the forest floor with bloody repercussions.  Finally, I came out of the forest after a hellish ride and found my fieldwork partner. Where have you been? He exclaimed, and  I had to reveal I  had fallen off the slope . He looked back at me with exasperation which turned into a quizzical look- What is wrong with the stick? I responded  with a hint of surprise-“ What stick?” I looked at the measuring stick.” Oops “I realized, it had just three parts instead of the regular  4 parts. It must have got lost in the forest when I fell I explained.But by somehow doing a “jugaad” with a natural stick, I finally measured the tree canopy with the refashioned stick. At last, we finished the plot and went back. Phew! What a day! But like many days on the field, uneventful ones are a rarity.

As I sat back resting in the comforting warmth of the fireplace in my room,I thought how many close shaves with danger I had gotten through that day! A rollercoaster adventure of a day in which I was lucky to come out relatively unscathed. A real wild ride! But it is these exhilarating times which make me live for field visits.It is with the same sense of wonder that the great naturalists in history –Darwin, Wallace, and Attenborough made their expeditions in dense forests, raging oceans and steep mountains overcoming some tricky encounters along the way. Without these adventures, none of the discoveries in natural history would have happened. I only hope to follow in these massive footsteps, with the same excitement, skirting dangers along the way in an endless quest to unravel nature’s enigmatic mysteries.

- Arjit Jere 





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