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Any fast moving object (i.e. bee, dragonfly, leaf, etc.) that enters a territory will be quickly chased. The chase allows the male bee to determine if a female is unmated, or if an enemy male is in his territory. If it is a male bee, the territory owner will chase it out, but not beyond the boundary of the territory.
Various explanations have been proposed for the evolution of the complex structure of the palpal organs found in most groups of spiders. One is the "lock-and-key" theory. The epigyne of the female spider also has a complex shape, and studies of pairs killed instantaneously during copulation show a precise fit between the male and female ...
The term comes from the Greek γυνή (gynē) 'female', ἀνήρ (anēr) 'male', and μορφή (morphē) 'form', and is used mainly in the field of entomology. Gynandromorphism is most frequently recognized in organisms that have strong sexual dimorphism such as certain butterflies, spiders, and birds, but has been recognized in numerous ...
This allows male moths to easily distinguish between mates of different species. The periods of activity for each moth are also different. For instance, the bristly cut-worm is active earlier in the night than the smoky tetanolita. Thus, the female spiders must adjust the level of chemicals produced to accommodate for different moths. [6] [8]
The male is reddish-brown with dark legs. His body length at 5 to 7 mm (0.2 to 0.3 in) is about half that of the female at 10 to 14 mm (0.4 to 0.6 in). [5] This spider rests head-downwards on the web with its legs flexed. Its colouring makes it well camouflaged. [6]
The lip of the flower resembles the (bilaterally symmetric) abdomen of a female bee; pollination occurs when a male bee attempts to mate with it. Animals with bilateral symmetry are classified into a large group called the bilateria , which contains 99% of all animals (comprising over 32 phyla and 1 million described species).
No, it's not a BBC Nature Video. It's a short video documenting the fight for survival between a bumble bee and a spider, and it's shot (and beautifully narrated) by London musician Keith John Adams.
A male Eresus sandaliatus. Sexual selection in spiders shows how sexual selection explains the evolution of phenotypic traits in spiders.Male spiders have many complex courtship rituals and have to avoid being eaten by the females, with the males of most species surviving only a few matings and consequently having short life-spans.