pugnacious leafcutter bee (megachile pugnata) collecting pollen from musk thistle carduus nutans flower in colorado

antennae megachile pugnata pollination pollinator pugnacious leafcutter bee agriculture biodiversity blooming botanical buzzing collecting colorado colorful conservation ecology ecosystem environment fauna flora flowering plant foraging garden growth habitat harmony insect behavior insects macro natural nature nectar outdoor pollen preserve purple flower rural source species stalk summer sunshine thistle vibrant wildflower wildlife wings musk carduus nutans actively gathering