the daily variations in conditions or behaviors, particularly in relation to living organisms

दैनिक परिवर्तन

English Usage: Birds often exhibit diurnal change in their feeding habits, foraging during the day.

Hindi Usage: पक्षी अक्सर अपने खाने की आदतों में दैनिक परिवर्तन दिखाते हैं, दिन के समय भोजन हेतु।