— Immer wieder —
Der Winter ging, der Sommer kam. Er bringt aufs neue wieder
Den vielbeliebten Wunderkram der Blumen und der Lieder.
Wie das so wechselt Jahr um Jahr, betracht ich fast mit Sorgen.
Was lebte, starb, was ist, es war, und heute wird zu morgen.
Stets muss die Bildnerin Natur den alten Ton benützen
In Haus und Garten, Wald und Flur zu ihren neuen Skizzen.
Wilhelm Busch (1832-1908)
What to expect:
![beechforest spring leaves beechforest spring leaves](http://portal-cdn.scnat.ch/asset/8fca1ad8-7c68-5895-ae13-0b05c643a726/bolliger_buchenwald3.jpg?b=7d970641-1873-5fc9-8095-9962d85ee5eb&v=b08408ae-ef3a-5fe7-a68c-2985be756707_100&s=EUE0FL1U8oFOJxusUNTJKr8vU7g4KJ6xAY8pEU_3469zHaftb8pLz5aK7J-GXJ48qW5OV9zDC_C0zVEgEU2pp935wJmPC5brirh76q6RpNcChhbkWmZqG9dz0F9kuvhhBstm18Ezuas7NvMScISGhqt2fT4OxflB-aklMYYLjCs&t=fc13185f-cc70-4eb1-86f2-ea80914407bc&sc=2)
Get to know seasonal research.
Long series of data show that spring in the 21st century arrives earlier than before.
![cereals poppy cereals poppy](http://portal-cdn.scnat.ch/asset/efc8eb7b-4ace-540e-bf93-b936ec0a16b9/bolliger_mohn.jpg?b=b99ff776-0de1-5452-a9bb-b4b2865382bb&v=8bdf89da-147b-5478-a667-13c58f883b8e_100&s=U2Q4NOrdEL3DLbNBmG6DBM2XKhqtsBxzx8KvGdxjYllVbP9NR1HxbTFpy6JnrE7Cw7DuOG3JFVK3xneLfNWm3L96i_LvxoYv4SwT5daRWGa6FbLhfgpv_uh3WO6VTzr5FJlqi3oNSd8eBMUzwesnaxzEoBgZo2m7B5-SUCQnuXs&t=fc13185f-cc70-4eb1-86f2-ea80914407bc&sc=2)
Explore the 10 seasons in the phenological calendar.
Learn about country sayings that are actually true.
![ast herbst waldboden laub ast herbst waldboden laub](http://portal-cdn.scnat.ch/asset/e33b536b-09f2-5225-bcf7-296f8fc4a952/bolliger_ast_am_boden.jpg?b=4f117613-1515-596f-a16c-bcda9d3ea536&v=fbe8b8bd-d8d1-54b7-af5c-72af36ad8242_100&s=Ino-NcW75elOAbFlwFuwv6NdmJByZmqzRWw1JkBLpeHaU5nNAlkHB3EnAGnyKnKKmY9_748bq2utWTblZDkydkTQn_5w72O3ynmKzK9wstScLLt6v0l7ugvYuTzK7gEuREjR8UYUyVTtBDz986UgfXtVhvYpjmrBy1-4VAfZIGA&t=fc13185f-cc70-4eb1-86f2-ea80914407bc&sc=2)
Learn how seasons form.
Explore the animal world throughout the changing seasons.
![snow winter pine tree snow winter pine tree](http://portal-cdn.scnat.ch/asset/aee27b11-a512-5962-a4d3-1717fe1ef4cc/bolliger_kiefer_im_schnee.jpg?b=3ddccc3a-d59c-5304-93e2-4dcc6e28661e&v=85ceccc5-a69d-5271-9165-e5ef27d23a52_100&s=AyAQYi1mvgTNUGmg05Lk7-4RoTZvg34EZs80NIfv3MmLFsl9SI1ZycefLvyubHnyqdLvlPCED1ZAV3B6bPOL4yzNFlxhEr8PRZTI24YU7LcZJD1U9zCmuFoY0q-jfwmEijMHgIaN_OjDV61toLSySImyUd2lSABwPMCPkqbDAhA&t=fc13185f-cc70-4eb1-86f2-ea80914407bc&sc=2)
Become active with our tips on how to "experience phenology".
Stay informed with our news.
![Maybug taking off Maybug taking off](http://portal-cdn.scnat.ch/asset/a24fae6b-93de-5de5-a6c1-0650ab3c3cf6/Maikafer_3.png?b=8717be9f-ec61-5ef2-9910-03210dbcb4aa&v=c4b3ff9b-3b13-5538-9bf0-69dc3524783b_100&s=aoLrZOUcp3_fzU_odi0kwe9nohrIsOYl7UuUIqVxqNkwPPGWrJK7z3XL1qttb3cT-Vk0YxOyZqn34945AYGJN8Y1me7uaWkxuCUUtdpwnMfg6zE7pQKq8PB4OWpoJE3JH_E03s0k-9F_AtYbodnMroPih-f4ULJ5q8l85vdeCAA&t=b1085d3c-fb5f-446e-ae88-ed9d76537838&sc=2)