Like a bridge over chiropteran water

Like a bridge over chiropteran water

  The Ann W. Richards Congress Avenue Bridge in Austin, Tex. is home to the world's largest urban bat colony. The Mexican free-tailed bats reside beneath the road deck in gaps between the concrete component structures. They are migratory, spending summers in Austin and winters in Mexico. Between 750,000 and 1.5 million bats live underneath the bridge each summer. The nightly emergence of the bats from underneath the bridge at dusk and their flight across Lady Bird Lake to feed, attracts as many as 100,000 tourists annually. Each evening, around sunset, the bats emerge like a winged cloud spiraling from the crevices of the bridge. Scouring the countryside in search of food, it’s estimated that the bats consume from 10,000 to 30,000 pounds of insects each night.

Weather folklore

  When pigs carry sticks, the clouds will play tricks.

  If the birds be silent, expect thunder.

  Wind from the West, fish bite the best. Wind from the East, fish bite the least. Wind from the North, do not go forth. Wind from the South, blows bait in their mouth.

Q-and-A

  "How old are pelicans when they breed?" They are 3 to 4 years old. An American white pelican of breeding age develops a nuptial tubercle, a kind of breeding bump on the upper bill.

  "What animal is attacking my garden?" I can’t say for sure, but there are clues to look for that might determine the culprit.

Deer leave ragged bites, typically a foot or more above the ground.

Rabbits clip stems cleanly at an angle a few inches above the ground.

Voles make flower bulbs or plant roots disappear. Teeth marks around the base of small trees indicate the presence of voles. Groundhogs leave evidence of mounds of dirt beside burrow entrances.  Chipmunks often leave uprooted plants. Squirrels, chipmunks, opossums, birds, raccoons, birds, deer, rats, etc. eat tomatoes. I’ve owned a dog, chickens, and peafowl that ate them. I tried playing a loud radio in the garden, but not even ABBA songs discouraged the thieves.

  "I saw a brown eagle trying to catch a fish. I thought it was a young bald eagle, but it looked bigger than one. What could it be?" If it was fishing, it was likely a young bald eagle. First-year bald eagles have longer flight feathers than their parents to aid them in flying.

  "The frogs were croaking loudly in the spring until I walked to the pond. Then they all became quiet. Was it me?" It is you. Somebody needed to tell you that. And if, by odd chance, it’s not you, it’s someone very much like you. The male frogs, although talkative, are as all males are, good listeners. And you, my friend, are a hulking giant to them. They hear you coming because you don’t pick up your feet. You know how you are. And if they all don’t hear you, one might and he becomes silent. The other male frogs, being good listeners, are silent until they figure out what is bothering their buddy. The frogs likely heard a twig snap or felt the earth move. Science has discovered that frogs are sensitive to substrate vibrations and that being males, they’re sensitive. Scientists came up with the first part of the previous sentence. I added the second part, because I’m sensitive.

 "What kind of bird is a rook?" It’s a bird that may move any number of unoccupied squares in a straight line, horizontally or vertically. No, wait a minute. That’s a chess piece. The rook is an abundant black Eurasian bird of the crow family. John James Audubon, who pursued an interest in the genetic traits of birds, raised a colony of European crows. One day, a friend asked Audubon, "Bred any good rooks lately?"

  "What eats dragonflies?” Purple martins, kestrels, merlins, gulls, spiders, frogs, flycatchers, kingbirds, blackbirds, swallows, turtles, herons, and other dragonflies are some that prey upon adult dragonflies.

  "What causes swimmer’s itch?" Swimmer's itch is a skin rash caused by an allergic reaction to microscopic parasites that are carried by snails and sometimes waterfowl.

In memory

  When I joined the local Audubon chapter long ago, one of the first members I got to know was Edna Aakre. She was amazing. Edna died recently. I never had Edna in the classroom, but she was still one of my favorite teachers. I cherished her friendship and will cherish her memory.

Thanks for stopping by

  "The way you get meaning into your life is to devote yourself to loving others, devote yourself to your community around you, and devote yourself to creating something that gives you purpose and meaning."--Mitch Albom

  "We abuse land because we regard it as a commodity belonging to us.

When we see land as a community to which we belong, we may begin to use it with love and respect."

-- Aldo Leopold

DO GOOD.

© Al Batt 2013