Compared to nectar utilization, how is the Wool Carder Bee's pollen collection generally focused?

More narrowly focused on reliably accessible, high-yield sources

Although the Wool Carder Bee utilizes a broad variety of flowers across different plant families specifically to collect nectar to meet its immediate energy demands, its strategy for gathering pollen is noticeably more selective and restricted. Pollen collection appears to be concentrated on sources deemed to be reliably accessible and offering a high yield of the essential protein material required for larval provisioning. This selectivity ensures that the significant time and energy expenditure involved in collecting dry, powdery grains results in the maximum nutritional benefit for the developing offspring. Therefore, a patch of wildflowers heavily visited by these bees is more likely to contain highly efficient pollen sources, such as members of the mint family, rather than a completely diverse, scattered selection.