रंगीन / चित्रित जांघिल, चेरिया झील, रायपुर
Painted stork, near Cheriya lake, Raipur
Painted stork, near Cheriya lake, Raipur
चित्रित जांघिल बहुत ही सुंदर और सुरुचिपूर्ण उड़ान भरते हैं । वे अक्सर चारागाह क्षेत्रों की तलाश में ऊंची उड़ान भरने के लिए वातावरण में ऊपर उठती गर्म हवा (लेट मॉर्निंग थर्मल) का उपयोग करते हैं। ये पक्षी अत्यधिक मिलनसार होते हैं, और उथले जलमयभूमि, फसल के खेतों और सिंचाई के नहरों में समूहों में भोजन करते हैं। पेंटेड स्टार्क या चित्रित जांघिल अपनी चोंच का सेंसर की तरह उपयोग करते हुए अपना भोजन ढूंढते हैं। वे धीरे-धीरे समूह में एक साथ चलते हैं और अपनी चोंच को पानी में डूबा कर रहने के दौरान अपने आधे खुले चोंच को धीरे-धीरे एक तरफ से दूसरी तरफ घुमाते हुए छोटी मछलियों को छिपने के स्थान से निकालने के लिए अपने पैरों से पानी को भी हिलाते हैं, इस तरह से मछलियों, केकड़े इत्यादि के संपर्क में आने पर उन्हें चोंच में दबा लेते हैं। इस तरह से भोजन करने को संपर्क कर चारा ढूंढना ( टेक्टाइल फोर्जिंग) के रूप में जाना जाता है, घोंघिल (स्टार्क) और बाजा (आइबिस) प्रजातियां अपने भोजन की तलाश में इस प्रकार की रणनीति अपनाते हैं। वे मुख्य रूप से दिन में अपना भोजन तलाशते हैं लेकिन कभी-कभी देर शाम को या रात में भी चारा की तलाश में देखे गए हैं। वे कड़े खोल वाले कीड़े जैसे घोंघे (क्रस्टेशियंस),केकड़े, उभयचर, कीड़े, सरीसृप, मेंढक और कभी-कभी छोटे सांप भी खाते हैं।
रंगीन / चित्रित जांघिल, का चारा ढूंढना चेरिया झील, रायपुर
Painted stork, tactile foraging near Cheriya lake, Raipur
Painted stork, tactile foraging near Cheriya lake, Raipur
Painted storks have a very beautiful and elegant flight. They often make use of the late morning thermals to soar in search of foraging areas. These birds are highly gregarious and feed in groups in shallow wetlands, crop fields, and irrigation canals. They walk slowly and also disturb the water with their feet to flush hiding small fish, crab etc. they sense by touch while slowly sweeping their half-open bill from side to side while it held submerged, this mode of foraging is known as tactile foraging, in general Stork and Ibis species adopt these strategies for finding their diet. They forage mainly in the day but may forage late or even at night under exceptional conditions. They also eat crustaceans, amphibians, insects, and reptiles, frogs and occasionally small snakes.
रंगीन / चित्रित जांघिल, केकड़े को पकड़ते हुए, चेरिया झील, रायपुर
Painted stork, tactile foraging catching crab Cheriya lake, Raipur
Painted stork, tactile foraging catching crab Cheriya lake, Raipur
रंगीन / चित्रित जांघिल, चेरिया झील, रायपुर
Painted stork, near Cheriya lake, Raipur
Painted stork, near Cheriya lake, Raipur
Soaring - What are the differences between Gliding and soaring? What do you think when you see a circling Rafter like black kite or a vulture at too high altitude? There is a lot of science involved in this. Various birds reduce journey time by performing more efficient soaring –gliding flight, reduced energy expenditure by flapping less and were more risk-prone by gliding more steeply between thermals. Individuals gain altitude by soaring on ascending air currents, and then glide to achieve horizontal displacement (alternate glides with periods of soaring in rising air). These ascending currents could be generated by topography or by thermal convective currents (air close to the ground heated by solar radiation). Many birds who are using gliding strategies and are higher flyer are able to "lock" their extended wings by means of a specialized tendon available in the wings. Thus, thermal soaring is a form of flight that saves much energy for not only birds but for paragliders, pilots and UAVs by exploiting nature’s energy present in the form of thermals. Five different types of lift are used by different birds or sometimes combination of it.
1. thermals, 2. dynamic soaring, 3. ridge lift, 4. convergences and 5. lee waves.
Examples of soaring flight by birds are the use of:
· Thermals and convergences by raptors such as storks, vultures, peregrine falcon, brown pelicans and eagles
· ridge lift by vultures, Honey Buzzards, eagles and gulls near cliffs
· Wave lift by migrating birds like White Storks and different Geese. These lee waves and convergence are used by nature for sufficient vertical displacement of clouds to cool the air to the dew point for rains.
· Dynamic effects near the surface of the sea by Wandering albatrosses (Diomedea exulans)
· The Andean condor is a South American vulture, can have a 3-meter wingspan and weighs up to 15 kg, making it the world’s heaviest soaring bird. This vulture can fly in single soaring flight for 100 miles without flapping wings, it flaps its wings just 1% of the time during flight,
Gliding - In gliding flight, a bird's wings deflect air downward, causing a lift force that holds the bird up in the air without flapping wings. By tilting forward and going into a slight dive, the bird can maintain forward speed. Some arboreal animals reduce their rate of falling by gliding. Gliding is heavier than air flight without the use of thrust the term "volplaning" also refers to this mode of flight in animals. This mode of flight involves flying a greater distance horizontally than vertically and therefore can be distinguished from a simple descent like a parachute or glider. There are some examples of gliding animals other than birds in several major taxonomic classes such as the invertebrates (gliding ants), reptiles (Chrysopelea ,banded flying snake, Draco lizards ), amphibians ( flying frog), mammals ( flying squirrel glider, lemur or Colugos).
टीप- इस ब्लॉग की तस्वीरें एवं लेख पक्षियों की निजता में बाधा बने बिना, उचित छलावरण का उपयोग करते हुए, मेरे 12 वर्षों के दृढ़ संकल्पित प्रयासों, बर्डवॉचिंग और जंगल रहने के दौरान किए गए अवलोकन एवं पंछियों पर विभिन्न पुस्तकों से प्रेरित हैं।
NOTE- The observations were made from a safe hide-out with proper camouflaged clothing and ambience. A considerable distance from the nest was maintained to avoid disturbances during observation. These photographs are collected and observations were made during my 12 years of immense efforts and birdwatching and roaming in the wild.
Sk gupta, B37, Madhuban colony, Amlidih, Raipur, Chattisgrah, 492001
+91 7000976901, 9406030683
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