Скачать или смотреть Pond Skater - Gerris lacustris - Vatnaskordýr - Ránflugur - Skordýralíf - Vatnaskautari

Pond Skater - Gerris lacustris - Water striders - Vatnaskautari - Vatnaskordýr - Ránflugur - Vatnapadda - Tjarnarskautari - Vatnafluga - Bruslařka obecná - Zapatero de agua - Gemeiner Wasserläufer - Schaatsenrijder - Water skippers - Water skeeters - Water skooters - Jesus bugs - Skortítuætt - Hemiptera - Þessi padda sem skautar á yfirborði vatnsins er sérstaklega til þess útbúin með þófa á fótunum - Vatnaskautari er rándýr sem veiðir alskonar skordýr í matinn sem setjast á yfirborðið á vatninu. Vatnaskautari er líka mjög góð að fljúga og flýgur á haustin inn í skóg þar sem hún leggst í vetrardvala. This predatory species feeds on mosquito larvae living under the surface, and dead insects on the surface, and other insects that accidentally land on the water.

Pond skaters have thin, brownish-grey bodies and small heads with large eyes. They use their legs to move across the pond’s surface. Using a rowing action the middle pair of legs propel them forwards, often at great speed. The back legs act as rudders while the short front legs seize dead or dying insects that have dropped onto the water. They have sensitive hairs on their bodies and legs to detect vibrations and ripples on the pond surface. See more: https://www.rspb.org.uk/birds-and-wil...

Water striders vary in length ranging between 8 millimetres and 10 mm in size. Their body shape is very slender and elongated. They have six legs; the first pair is short and stubby while the other two pairs are thin and elongated which are used for moving over the water surface which we call "walking on water". The first pair of legs is used for holding its prey, the middle pair propels the bug along the surface of the water with either a rowing or jumping motion, and the hind pair of legs is used as rudders. The entire body of G. lacustris including its legs is covered with many tiny hairs that have a wax-like coating. G. lacustris are dark brown in colour. Water striders have very strong sucking mouthparts known as a rostrum or beak. females are usually significantly larger than the males and the egg production rate is limited by the amount of food resources that are available to the female; the more food there is the more eggs the female lays. The adult water striders emerge around April and May. It is around this time that females lay eggs where the eggs undergo a process that takes about 12 to 14 days to develop before they are able to hatch. Hatching doesn't necessarily follow the eggs when their development is complete; hatching heavily depends on the temperature that the egg is exposed to in its environment. After hatching, G. lacustris go through another separate development process known as incomplete metamorphosis. In this process, the larvae or nymphs progress through a series of moults which basically are stages known as instars. There are five instars in the developmental process, with each one progressively longer than the last. See more: http://en.wikipedia.org/wiki/Gerris_l...

They are quickly attracted to movement in the surface film, such as the struggles of a non-aquatic insect that has fallen into the water. The pondskater will then 'row' across the water at high speed to investigate and secure its prey, using its front legs to grasp the victim. It flies well as an adult and quickly colonises a newly created garden pond. Nymphs June to August. See more: http://www.naturespot.org.uk/species/...

Pond skaters all look very similar to each other but there are actually 10 different species found on ponds and lakes in Britain – and they venture out onto rivers too. Pond skaters are predatory bugs that mainly go around picking off the dead and unfortunate animals that fall onto the water surface and are trapped there. The common garden species are all good fliers which can easily move from pond to pond. But they can’t all fly, and when they find a nice spot some of their young will often be a type that doesn’t have wings. As winter approaches pond skaters will also produce young that can fly, and they so can move to a winter hibernation spot that’s safe. There are two other groups of animals that like pond skaters you might see on the water surface. These are the common water striders (Hydrometra stagnorum – Hi-dro-mee-tra stag-nor-um) and one of the two species of Water Crickets (Velia species – vee-lee-aa). Neither skates like a skater: water measurers trot about with a high stepping grace like a miniature prancing pony; water crickets scuttle across the water, their little legs going for all they are worth. The truly eagle-eyed might also spot pigmy water crickets. See more: https://freshwaterhabitats.org.uk/pon...

Duck weed - Lemna minor
Floating fern - Salvinium natans