The Natural Calendar: April
What to look for, where, and how sure we are.
Tulips and bulbs (the Netherlands): the bulb fields bloom through April, with Keukenhof's season running from 19 March to 10 May this year. Predictable season; the peak depends on the spring weather.
Rhododendron bloom (Uttarakhand and the Himalayas): the burans, Uttarakhand's state tree, flowers at mid altitudes in spring, and Kumaon is one place to see it. Reliable window of a few weeks; varies with altitude and the year's weather.
Heat and new year skies (Thailand and Assam): April is hot across much of Thailand and the Assam plains, and the new year festivals arrive in the heat. Plan outdoor visits for early morning and late afternoon.
Spring migration: many birds begin to move north across Asia and Europe. A broad pattern; local timing depends on species and weather, so ask a local guide. Treat every date in this column as a window rather than a promise, and let a local naturalist tell you what is happening this particular year.
Prices, dates, permits and rules change — approximate, verify before you travel. Researched from public sources; field verification pending.
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