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These spiders are medium to large in size, ranging from 1 to 3 centimetres (0.39 to 1.18 in). They have a glossy carapace and high, broad heads with eyes spread out across the front of the head, [5] [6] and short spinnerets in the rear of the abdomen. They also exhibit sexual dimorphism. Females are entirely black, while male colouration is ...
a: ^ Jackson and Blest (1982) say, "The resolution of the receptor mosaic of Layer I in the central retina was estimated to be a visual angle of 2.4 arc min, corresponding to 0–12 mm at 20 cm in front of the spider, or 0–18 mm at 30 cm." b: ^ Several species of cursorial spiders drink nectar as an occasional supplement their diet, and juveniles of some orb-web spiders digest pollen while ...
Lycosa tarantula is the species originally known as the tarantula, a name that nowadays in English commonly refers to spiders in another family entirely, the Theraphosidae. It now may be better called the tarantula wolf spider , being in the wolf spider family, the Lycosidae.
Sunflowers do not always point to the Sun. Flowering sunflowers face a fixed direction (often east) all day long, but do not necessarily face the Sun. [123] However, in an earlier developmental stage, before the appearance of flower heads, the immature buds do track the Sun (a phenomenon called heliotropism). Mature flowers face east. [124]
Many species breed in moving water, where there is a tendency for the eggs and nymphs to get washed downstream. To counteract this, females may fly upriver before depositing their eggs. For example, the female Tisza mayfly , the largest European species with a length of 12 cm (4.7 in), flies up to 3 kilometres (2 mi) upstream before depositing ...
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Minecraft "Perhaps the biggest stroke of genius in Minecraft". [67] This red mineral serves as in-game wiring, letting players lay down logic circuitry that controls pistons, minecarts and other dynamic elements in the game. [67] It is found as ore in deep caves.
Naked and Afraid is an American reality series that airs on the Discovery Channel.Each episode chronicles the lives of two survivalists (1 woman; 1 man) who meet for the first time and are given the task of surviving a stay in the wilderness naked for 21 days.