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[12] [13] The nectar of ornithophilous flowers vary in the sugar composition, with hexoses being high in passerine pollinated species while those that are insect pollinated tend to be sucrose rich. Hummingbird pollinated flowers however tend to be sucrose rich. [14] Different plants have also developed specific adaptations for bird pollination.
Ecological competition with long-tongued bees for ornithophilous flowers is a suggested explanation for the extinction of Eurotrochilus and modern hummingbirds in Europe. [6] Another possible explanation for their extinction is rapid climate change from the suspected moderate tropical climate, which would have been a critical problem ...
Tubular flowers force a bird to orient its bill in a particular way when probing the flower, especially when the bill and corolla are both curved. This allows the plant to place pollen on a certain part of the bird's body, permitting a variety of morphological co-adaptations. [20] Ornithophilous flowers need to be conspicuous to birds. [20]
Hummingbirds are specialized nectarivores tied to the ornithophilous flowers upon which they feed. [53] This coevolution implies that morphological traits of hummingbirds, such as bill length, bill curvature, and body mass, are correlated with morphological traits of plants, such as corolla length, curvature, and volume. [54]
Corymb – a grouping of flowers where all the flowers are at the same level, the flower stalks of different lengths forming a flat-topped flower cluster. Cyme – is a cluster of flowers where the end of each growing point produces a flower. New growth comes from side shoots, and the oldest and first flowers to bloom are at the top.
Nectarivores and ornithophilous flowers often exist in mutualistic guild relationships facilitated by the bird's bill shape, food source, and digestive ability acting in concert with the flower's tube shape and adaptation to pollination by hovering or perching birds. The birds eat nectar using their long, thin bills and, in so doing, collect ...
The flowers are ornithophilous and the seeds are dispersed by animals. [1] As invasive plants. In New Zealand, Bomarea has become invasive. [14] [15] References
Eremophila includes entomophilous species, with flowers adapted to attract insects, and ornithophilous species, with flowers that attract birds. Entomophilous flowers have protruding lower lips, which provide a landing area for insects, and they are often blue, purple, or white.
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