Table 1.

Selected functional traits of pollinator species

Functional traits	Unit/score/categories	Explanation
Wild bees
[WB 1] Sociality	Solitary	Nest foundation occurs alone; no division of labour and no storage of food stocks
	Eusocial	Organised society, which includes division of labour between the nest founder (queen) and the workers; short-lived (usually one growing season). All levels of social life have been included
	Cleptoparasitic	Brood parasitic way of life
[WB 2] Nesting behaviour	Hypergeic	Aboveground nesting; cavities in trees and masonry, plant stems, snail shells and between rocks
	Endogeic	Belowground nesting in self-excavated or existing cavities
	Hyper- and endogeic	Combination of the two nesting types
	Cleptoparasitic	Penetration into foreign nests and deposition of the eggs therein
[WB 3] Diet	Oligolectic	Pollen specialisation
	Polylectic	No binding to certain plant species
	Cleptoparasitic	No collection of pollen
[WB 4] Active flight time	# Average number of months	Average flight period of female and male individuals
[WB 5] body size	# Average size in mm	Average size of female individuals from the anterior extremity of the head (excluding the antennae) to the posterior extremity of the abdomen
Hoverflies
[HF 1] body size	# Average size in mm	Average size of adult individuals from the anterior extremity of the head (excluding the antennae) to the posterior extremity of the abdomen
[HF 2] active flight time	# Average number of months	Average flight period of female and male individuals
[HF 3] migratory status	0/1 (no/yes)	Ability to undertake long-distance movements
[HF 4] larval food type	Phytophagous	Nutrition through plant components
	Zoophagous	Nutrition through animals, especially aphids
	Terrestrial saprophagous	Nutrition through microorganisms in terrestrial substrates (rotting herbaceous plants, dung, tree hollows, sap flows, etc.)
	Aquatic saprophagous	Nutrition through microorganisms in aquatic substrates (puddles, wastewater, liquid manure or mud at the bottom of waters)