Rarely alighting on plants, hummingbirds hover in front of flowers and probe their long bills deep into flower centers, exchanging pollen from flower to flower, pollinating plants as they feed on nectar.
(they; feed; ) (hummingbirds; hover; in front of flowers) (hummingbirds; probe; their long bills)
they hummingbirds hummingbirds
feed hover probe
in front of flowers
their long bills