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Bull Ants Feed at Twilight

Bull ants do not feed during all daylight hours. Observation has shown that they feed at twilight. When the sun is brighter for longer for example in summer, or there is no cloud cover, bull ants forage for food later in the day. When the sun is darker, earlier, they search for food sooner in the day. It was believed that all insects fed according to circadian rhythms, but this does not seem to be the case.

Activity in the nest was affected by cloud cover. Outside activity that involves feeding occurs at twilight. Obviously, they are feeding during these short intervals to avoid predators: most animals that eat ants would be inactive at twilight.

Tests were done at ANU in Canberra. Bull ants were put in containers where diffused light was altered. It was found they only fed when the light was set at a particular low level. Evolution does take some winding paths. This shows though that evolution develops in a rational way.

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Entomology

Vista Computer Solutions Blog

Cat Tidbit

"No thank You...Maybe later."

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Funny Animal Photos

Plastic Surgery Does More Harm Than Good

Dr. Craig Layt a plastic surgeon says potential patients should consult a qualified surgeon before going ahead with surgery. I thought people were doing that already. If the government is allowing unqualified practitioners to do plastic surgery then shame on them. Governments must be held responsible if things go wrong when "upstarts" do surgery.

Apparently, women who have breast enhancements are not told whether they will be able to breast feed in the future. Surely, patients are thoroughly informed of the operation and the possible consequences.

Women can breast feed after the operation, but breast feeding can completely ruin the implants. They can sag. Furthermore, liposuction should not be used just to lose weight. This procedure can leave a visible indentation in the body. Facelifts are notoriously visible when celebrities tippytoe to the surgeon. Patients who have plastic surgery may have improved self-esteem. This may be due to others not telling them the truth.

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Health

Dog Food Bite

"Please feed me."

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Funny Animal Photos

Labels: bite , chew , dog , eat , feed , food , hungry , jaws , puppy , teeth

Cat Computer Food

"I want feeding. You listenin'?"
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Funny Animal Photos

Whales Took an Evolutionary Leap Forward

Eons ago ancestors of whales made a major leap forward in evolution of their mouths. Whales living today can filter-feed in large amounts because the lower jaw is flexible in movement.

Ancient fossils such as Janjucetus hunderi do not have such a mobile lower jaw. The development of this attribute probably initially evolved to consume large living prey. It began with a wide upper jaw and normal teeth - no comb filters. Erich Fitzgerald from the Museum Victoria in Melbourne has created a family tree showing whale evolution.

The way whales feed is unique. It is believed that sucking when feeding still takes place, a left over from the days of the wide upper jaw.

A big question is why whales went back into the sea in the first place.

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Anthropology

Bull Ants Feed at Twilight

Bull ants do not feed during all daylight hours. Observation has shown that they feed at twilight. When the sun is brighter for longer, for example in summer or there is no cloud cover, they forage for food later in the day. When the sun is darker, earlier, they search for food sooner in the day. It was believed that all insects fed according to circadian rhythms, but this does not seem to be the case.

Activity in the nest was affected by cloud cover. But outside activity that involves feeding occurs at twilight. Obviously, they are feeding during these short intervals to avoid predators. Most animals that eat ants would be inactive at twilight.

Tests were done at ANU in Canberra. Bull ants were put in containers where diffused light was altered. It was found they only fed when the light was set at a particularly low level. Evolution does take some winding paths. This shows though that evolution develops in a rational way.