Honey bee winter mortality

Honey bee winter mortality from the Belgian Coloss survey (winter 2016-2017) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2017-2018) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2018-2019) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2019-2020) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2020-2021) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2021-2022) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2022-2023) :

Honey bee winter mortality from the Belgian Coloss survey (winter 2023-2024) :