This 20 April 2018 Dutch video is about the first ever national bee count.
On 21 and 22 April 2018 was the first ever national bee count in the Netherlands. 3400 people counted almost 35,000 bees of various species.
The most counted species was the honey bee: almost 12,000 individuals. Second was the red mason bee, counted over 5,000 times. That wild bee species often lives in insect hotels. That it was counted so much is a sign that insect hotels work,