Phenological parameters such as blooming, maturity phases and bird migration are among the most visible indicators of climate change. In this study, we carried out a complete evaluation of available phenological data for the territory of Latvia for the period from 1970 to 2018. We examined 148 phenological phases spanning six taxonomic groups – plants, animals, insects, amphibians, fish and mushrooms. Separately we considered crops and abiotic phenomena like the first snowfall, the last spring

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... rost and agricultural activities such as the beginning of livestock grazing, potato planting, etc. As a result, a calendar of natural rhythms was established for the Latvian landscape, indicating the most frequent or most representative accession time for these phenological phases and the earliest and latest accession values between 1970 and 2018.