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"The cowslip (Primula veris) has two kinds of flowers in nearly equal proportions: in the one the stamens are long and the style short, and in the other the reverse, so that in one the stamens are visible at the mouth of the tube of the flower, in the other the stigma occupies the same place, while the stamens are halfway down the tube. The ...
The list comprises butterfly species listed in The Moths and Butterflies of Great Britain and Ireland by Emmet et al. [1] and Britain's Butterflies by Tomlinson and Still. [ 2 ] A study by NERC in 2004 found there has been a species decline of 71% of butterfly species between 1983 and 2003. [ 3 ]
The society's annual 2020–2021 winter count showed a significant decline in the California population. One Pacific Grove site had no monarch butterflies. A primary explanation for this was the destruction of the butterfly's milkweed habitats. [24] [167] This particular population is believed to comprise less than 2000 individuals, as of 2022.
Lepidoptera (/ ˌ l ɛ p ɪ ˈ d ɒ p t ər ə / LEP-ih-DOP-tər-ə) or lepidopterans is an order of winged insects which includes butterflies and moths.About 180,000 species of the Lepidoptera have been described, representing 10% of the total described species of living organisms, [1] [2] making it the second largest insect order (behind Coleoptera) with 126 families [3] and 46 superfamilies ...
Plants fall into pollination syndromes that reflect the type of pollinator being attracted. These are characteristics such as: overall flower size, the depth and width of the corolla, the color (including patterns called nectar guides that are visible only in ultraviolet light), the scent, amount of nectar, composition of nectar, etc. [2] For example, birds visit red flowers with long, narrow ...
Floral diagram of Anagallis arvensis. [1]: 307 The dot represents the main axis, green structure below is the subtending bract.Calyx (green arcs) consists of five free sepals; corolla (red arcs) consists of five fused petals.
The number of managed beehives in the US has steadily declined from close to 6 million after WWII, to less than 2.5 million today. In contrast, the area dedicated to growing bee-pollinated crops has grown over 300% in the same time period.
Some butterflies, especially in the tropics, have several generations in a year, while others have a single generation, and a few in cold locations may take several years to pass through their entire life cycle. [3] Butterflies are often polymorphic, and many species make use of camouflage, mimicry, and aposematism to evade their predators. [4]
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