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Handling time as a function of sugar content (a) among insects that visit plant species of which the nectar tube is longer than their proboscis (R2 adj = −0.11, P = 0.830, N = 10) and (b) among insects that visit plant species of which the nectar tube is shorter than their proboscis (R 2 adj = 0.48, P < 0.001, N = 105). Colours represent the different insect orders (blue: Lepidoptera, green: Hymenoptera and red: Diptera).
