Importance of bumblebees (Hymenoptera: Apidae: Bombus spp.) in the diet of European Bee-eaters (Merops apiaster) breeding in oceanic climate

Breeding attempts of European Bee-eater ( Merops apiaster ) pairs have occasionally been documented far north of the species’ normal range, exceptionally as far as the 17 °C July isotherm. These attempts often failed—in many cases in association with adverse and fluctuating weather conditions, which...

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