Every year the season officially starts with the appearance of the European orchard bees (Osmia cornuta) [1]. This female has stuffed her nest and is busy closing it with clay.

References
1 Nederlands SoortenregisterBee hotel
Osmia cornuta (European orchard bee)♀︎
Collection
Osmia cornuta
European orchard bee
LOCATION: Krimpen aan den IJssel, garden
OBSERVATION:
2023-IV-17
Every year the season officially starts with the appearance of the European orchard bees (Osmia cornuta) [1]. This female has stuffed her nest and is busy closing it with clay.
References
1 Nederlands Soortenregister