Thursday, August 28, 2014

Slug’s life revolves around mucous


Silvery tracks cross the deck and occasionally the concrete walkway in the morning. During the driest days of summer the silvery tracks were absent but with the recent rains the tracks of the slug are back.

Most active at night, slug tracks are usually seen more than the slugs themselves. The slug’s biggest danger is drying out so it tends to seek shelter during the day under debris or in the soil. 

A layer of mucous secreted by the pedal slime gland helps slugs move across the ground

Thursday, August 21, 2014

Horsetails rooted in history


Long before scouring pads were invented for cleaning dishes, Europeans and American settlers utilized what was available in nature--scouring rushes and horsetails. The widespread use of scouring rushes for cleaning wood and pewter utensils gave scouring rushes their name. 

The branches of horsetails grow in whorls around a single stem
Not only good for cleaning, Native Americans used horsetails like sandpaper. Equisetum species, including scouring rushes and horsetails, contain silica in their cell walls which makes them rough to the touch and good for cleaning and sanding. 

Horsetails and scouring rushes are unique plants found almost worldwide except for Australia, New Zealand and various islands. The common horsetail is one of the most widespread plants in the world, even found in the Arctic. 

Thursday, August 14, 2014

Dragonflies most successful predator in animal kingdom


Dragonflies, butterflies and ladybugs are often considered “nice” insects with their pretty colors and seemingly harmlessness. However, dragonflies are far from harmless--they may be one of the most successful predators in the animal kingdom. 

African lions are ferocious but their hunts are only successful 25 percent of the time. The great white shark only captures prey 50 percent of the time.

For the small size of the dragonfly, it can be brutal. Dragonflies capture 90 to 95 percent of the prey they hunt and it can be devoured within seconds with the dragonfly’s serrated teeth. Some dragonflies capture and eat their prey so quickly the act can only be seen on high-speed cameras.

Dragonflies hold their wings straight out when at rest

Thursday, August 7, 2014

Waxwings flock to fruit year-round


By mid-summer most birds have finished nesting and the young have fledged,  but one bird is a late nester compared to the rest--the waxwing. 

The emergence of insects coincides with the hatching of birds in the spring. But waxwings wait until the berry crop is ripe to raise their young.

Cedar waxwing nestlings wait for their parents to bring back ripe fruit

Both the Bohemian and cedar waxwing eat more fruit than any other bird in North America, including fruit from serviceberries, chokecherries, dogwoods, crabapples, mountain ash, junipers, strawberries and blackberries. Bohemian waxwings can eat two to three times their weight in fruit each day and more if they are feeding nestlings.