4 (also monitor lizard) A large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles.Called goanna in Australia. (also monitor lizard) A large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles.
The most effective way to prevent black toenails is to run in shoes that fit properly. You should have a thumbnails width room between your big toe and the front of your shoe while standing, not sitting. You should also wear moisture thin, moisture wicking socks to prevent increased heat build-up.
The black nail is caused by the bumping of the toe forward, slinging a bit more blood under the nail with every step. Running on icy, snowy paths require greater traction and a slower pace thereby causing more bumping of the toe into the front of the shoe. Keep your toenails clipped so as to keep more distance.