Canadian caterpillars and pikas helping each other


This video from Alaska is called Collared Pika- Denali National Park.

From the University of Alberta in Canada:

Discovered: A mammal and bug food co-op in the High Arctic

University of Alberta researchers were certainly surprised when they discovered the unusual response of pikas to patches of vegetation that had previously been grazed on by caterpillars from a species normally found in the high Arctic.

U of A biology researcher Isabel C. Barrio analyzed how two herbivores, caterpillars and pikas, competed for scarce vegetation in alpine areas of the southwest Yukon. The caterpillars come out of their winter cocoons and start consuming vegetation soon after the snow melts in June. Weeks later, the pika starts gathering and storing food in its winter den. For the experiment, Barrio altered the numbers of caterpillars grazing on small plots of land surrounding pika dens.

“What we found was that the pikas preferred the patches first grazed on by caterpillars,” said Barrio. “We think the caterpillar’s waste acted as a natural fertilizer, making the vegetation richer and more attractive to the pika.”

U of A biology professor David Hik, who supervised the research, says the results are the opposite of what the team expected to find.

“Normally you’d expect that increased grazing by the caterpillars would have a negative effect on the pika,” said Hik. “But the very territorial little pika actually preferred the vegetation first consumed by the caterpillars.”

The researchers say it’s highly unusual that two distant herbivore species—an insect in its larval stage and a mammal—react positively to one another when it comes to the all-consuming survival issue of finding food.

These caterpillars stay in their crawling larval stage for up to 14 years, sheltering in a cocoon during the long winters before finally becoming Arctic woolly bear moths for the final 24 hours of their lives.

The pika does not hibernate and gathers a food supply in its den. Its food-gathering territory surrounds the den and covers an area of around 700 square metres.

The researchers say they’ll continue their work on the caterpillar–pika relationship to explore the long-term implications for increased insect populations and competition for scarce food resources in northern mountain environments.

Barrio was the lead author on the collaborative research project, which was published April 24 in the journal Biology Letters.

The pikas of this research are collared pikas. The caterpillars are of the Arctic woolly bear moth species.

Costa Rican ‘Peter Pan’ fairyfly discovered


This image shows a female Tinkerbella nana. The Scale line = 100 μm. Credit: John T. Huber

From Pensoft Publishers:

Tinkerbella nana — a new representative from the world of fairyflies

A new genus and species of fairyfly, Tinkerbella nana (Mymaridae) is described from Costa Rica. It is compared with the related species Kikiki huna Beardsley and Huber, which holds the record for the smallest winged insect. The new genus and species is named after the fairy Tinker Bell in the 1904 play “Peter Pan” by J. M. Barrie. The study was published in the open access journal Journal of Hymenoptera Research.

Mymaridae, commonly known as fairyflies, are one of about 18 families of chalcid wasps. Fairyflies occur worldwide, except in Antarctica. They include the world’s smallest known winged insect – Kikiki huna, the body length of which is only 155 μm, and the smallest known adult insect – the wingless male of Dicopomorpha echmepterygis which is only 130 μm. Although fairyflies are among the most common chalcid wasps, they are seldomly noticed by humans because of their minute size. Their apparent invisibility, gracile bodies and delicate wings with long fringes resembling the mythical fairies have earned them their common name.

All but two known fairyfly species are parasitoids of eggs of other insects. These eggs are commonly laid in concealed locations, such as in plant tissues or in leaf litter or soil and are difficult to find, so for the most part the host insects of fairyflies are unknown. Specimens of the new species Tinkerbella nana were collected at the La Selva Biological Station, a lowland rainforest research and education facility owned and managed by the Organization for Tropical Studies, located in the province of Heredia, Costa Rica. They were collected by sweeping in fairly young (no more than 20 years old) secondary forest mixed with a primary forest. All the specimens collected were below 250 μm in length. The reduced wing surface and relatively long setae of fairyflies and many other minute flying insects likely have an aerodynamic function, perhaps to reduce turbulence and hence drag on a wing flapping at several hundred beats per second. The study of the new species was published in the open access journal Journal of Hymenoptera Research.

This image shows the typical fairy-like habitat of Tinkerbella nana (La Selva Biological Station, Costa Rica) IMAGE: This image shows the typical fairy-like habitat of Tinkerbella nana (La Selva Biological Station, Costa Rica).Click here for more information.

Almost 2000 years ago, Pliny the Elder (ca. 23 A.D.) stated “Rerum natura nusquam magis quam in minimis tota est” loosely translated as “Nature is nowhere as great as in its smallest.” Lacking any means of magnification, he could not possibly have seen the intricate structure and beauty of fairyflies or other minute organisms. But his statement certainly holds true.

“If something is physically possible in living things, some individuals of at least one species, extinct or extant, will likely have achieved it. So the lower size limit, by whatever measure of size is chosen, was almost certainly already evolved—somewhere, sometime. If we have not already found them, we must surely be close to discovering the smallest insects and other arthropods”, says the lead author, John Huber from Natural Resources Canada.

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Original Source

Huber JH, Noyes JS (2013) A new genus and species of fairyfly, Tinkerbella nana (Hymenoptera, Mymaridae), with comments on its sister genus Kikiki, and discussion on small size limits in arthropods. Journal of Hymenoptera Research 32: 17. doi: 10.3897/JHR.32.4663

Bumblebee on flower, video


This video shows a male white-tailed bumblebee drying itself on a flower.

The video was made by Marjo in the Netherlands.

New bee species named after Noam Chomsky


The new bee species, photo credit: Cory S. Sheffield (Royal Saskatchewan Museum)

From Nature World News in the USA:

New Species Of Bee Named After Noam Chomsky

By James A. Foley

Apr 04, 2013 12:21 PM EDT

Noam Chomsky is not a fan of ridiculous comparisons. So it’s still unclear how he’ll take to the newly discovered species of bee that has been named after him.

The new species belongs to one of the largest genera of bees, the genus Megachile, with more than 1,500 species in at least 50 subgenera. Chomsky, on the other hand, is one of a kind.

Endemic to Texas, the newly-discovered species of leafcutter bee, Megachile chomskyi, has highly particular tastes in the sort of pollen it goes after. Having lectured, wrote and researched at the same university for more than 50 years, you might say Chomsky is endemic to MIT, where he reportedly has particular tastes in turkey sandwiches: plan, no mayo, definitely no avocado, maybe some lettuce and tomato.

An exaggeratedly long tongue and definitive jaw structure are the most prominent features of the new leafcutter bee. As it is, Chomsky’s tongue, or at least his work as a linguist, is world renowned. Though it’s probably of average size.

Noam Chomsky is a highly regarded linguist, political philosopher and historian, who has been described as the “father of modern linguistics” and the world’s “top public intellectual.”

This is not the first time an animal has been named after Chomsky. A chimpanzee who was the subject of an extended study on animal language acquisition at Colombia University was named Nim Chimpsky, a clear pun of Noam Chomsky.

In naming the new species of leafcutter bee, its discoverer, Dr. Cory Sheffield of the Royal Saskatchewan Museum, said, “In addition to naming the species after Dr. Chomsky to honor his many accomplishments, I also have been a huge fan and follower of his writings, lectures, and political views for a long time.”

Scheffield’s study of the Megachile chomskyi is published in the open access journal ZooKeys.

First chiffchaff song, first brimstone butterfly, of spring


Today was the first “real” spring day, above 20 degrees centigrade, after a cold early spring.

This is a video about a singing chiffchaff.

This morning, on my way to the railway station, I heard the first chiffchaff song. Later than in earlier years.

Later, at a pond in Santpoort, two Egyptian geese on the bank, and tufted ducks swimming.

In a garden, the first brimstone butterfly of the year.

This is a brimstone butterfly video.