New Jersey red maples are a vital lifeline in early spring

Red maple flowers in New Jersey bloom early and supply abundant nectar and protein-rich pollen when many pollinators emerge, supporting bees, caterpillars, birds and other wildlife.

Red maple trees in New Jersey bloom early in spring, offering one of the season's first sources of nectar and pollen. Their small crimson flowers are easy to overlook but become a lifeline for early-emerging pollinators as soils warm. Female mining bees dig narrow tunnels in warming soil to make nests and depend on available pollen and nectar to start and provision those nests. Other bees including honeybees, bumblebees, cellophane bees and sweat bees also visit the flowers, while the trees support caterpillars, birds and mammals across the year. Key facts: - Red maples bloom in March and April and produce abundant nectar and protein-rich pollen during a brief early-spring window. - Female mining bees excavate individual nesting tunnels in warming soil and use the flowers' resources to provision nests; honeybees, bumblebees, cellophane bees and sweat bees also gather nectar and pollen. - Insect visitors substantially increase pollination and fertilization for red maples, although wind can also move pollen. - Red maples are a foundation species: their foliage feeds moth caterpillars (including Hyalophora cecropia and Dryocampa rubicunda), large trees provide nesting habitat for barred owls and red-shouldered hawks, and seeds and hollows offer food and shelter for squirrels, small rodents and songbirds. Summary: Because red maples provide early-season food and habitat, they connect a wide community of insects, birds and mammals and help sustain local ecosystems. Scientists report that shifting climate patterns could produce phenological mismatch between bloom timing and pollinator emergence; the next status of those relationships is undetermined at this time.