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লবণের খোঁজে আমাজনের ম্যাকাউ

অদ্ভুত
PUBLISHED: December 4, 2020

আমাজনের জঙ্গলের ম্যাকাউসহ নানা জাতের টিয়া পাখির কাদা মাটির প্রতি ভারি আগ্রহ। নদীর তীরে এদের বড় বড় ঝাঁককে নরম মাটি ঠোকরাতে দেখা যায়। কিন্তু এই পাখিদের মাটি খাওয়ার কারণ কী? প্রশ্নের উত্তর খুঁজেছি।

অনেক তৃণভোজী প্রাণীই উদ্ভিদ থেকে পর্যাপ্ত লবণ পায় না। স্নায়ুগুলো সক্রিয় রাখতে, শরীরে তরলে ভারসাম্য ঠিক রাখাসহ নানা কারণে লবণ দরকার। কাদা মাটি সোডিয়াম লবণের ভালো উত্স। তেমনই পটাসিয়াম আর ম্যাগনেসিয়ামও আছে এতে। তাই পাখিসহ বিভিন্ন প্রাণী মাটি চাটে। এই মাটির স্তরগুলো পরিচিত সল্ট লিক নামে।
আরেকটা মতবাদ হলো, পাখিরা মাটি খায় বা চাটে বিষাক্ত পদার্থ থেকে রেহাই পেতে। বিভিন্ন উদ্ভিদ থেকে যেটা তাদের দেহে আসে। মাটি খাওয়ার ফলে মাটির উপাদানগুলো কুইনাইন, ট্যানিক এসিডের মতো বিষাক্ত পদার্থগুলোকে শুষে নেয়, ফলে ওগুলো আর শরীরে মেশে না।

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