Natural Calendar - May 2023

The purpose of this feature is to give scout leaders, educators and naturalists an idea of some of the natural events coming up each month.  We will try to cover a variety of natural events ranging from sky events to calling periods of amphibians, bird and mammal watching tips,  prominent wildflowers and anything else that comes to mind.  We will also note prominent constellations appearing over the eastern horizon at mid-evening each month for our area for those who would like to learn the constellations.  If you have suggestions for other types of natural information you would like to see added to this calendar, let us know!

Note: You can click on the hyperlinks to learn more about some of the featured items.  To return to the Calendar, hit the "back" button on your browser, NOT the "back" button on the web page.  All charts are available in a "printer friendly" mode, with black stars on a white background.  Left clicking on each chart will take you to a printable black and white image. 

Though we link book references to nationwide sources, we encourage you to support your local book store whenever possible.

 

Notes From April 2023

April was a family-oriented month at Cloudland. My resident pair of Eastern Phoebe's moved back into the nest in my shed and now have young nestlings. They have a pretty cozy home on top of a non-functional fluorescent light fixture in my shed, out of the wind and the rain. Most recently, a pair of Red-shouldered Hawks are tending a stick nest in an oak beside my driveway.

 
 
 
Emerging Cattails at Sunrise, April 29th, 2023

The cattails in the pond are reaching skyward again. The trees are full of birds. Among the leaves and catkins newly arrived neotropical migrants dart about looking for food. One gray and misty morning I heard a Cerulean Warbler calling from one of the oaks in my front yard. The fog lifted later in the morning and he gave me a great view. Other arriving warblers included Black-and-white, Palm, Tennessee, Hooded, and Black-throated Green warblers, Northern Parula, Ovenbird, Common Yellowthroat and Yellow-breasted Chat.

Eleven species of frogs have called so far this year at Cloudland. Winter callers like Upland Chorus Frogs, Spring Peepers, Southern Leopard Frogs. Pickerel Frogs and American Toads were joined in April by Fowler's Toad, Eastern and Southern Cricket Frogs, Cope's Gray Treefrog, Green Treefrog and Green Frog. Bullfrogs, Eastern Narrow-mouthed Toads and Barking Treefrogs should be calling as soon as we get through this latest dip in nighttime temperatures.

 
Sky Events for May 2023:

The Eta Aquariid Meteor Shower peaks on the mornings of May 6th, 7th and 8th. Unfortunately, moonlight will tend to wash out the show this year.

Morning Sky:

Saturn, Tethys and Dione, June 11th, 2016, 20 Inch Newtonian Reflector and ZWO Camera. South is up to match the view in an inverting telescope.
Jupiter and Saturn are both in the morning sky now. At the beginning of the month Saturn is in Aquarius. Look for it about 30 minutes before sunrise in the southeast, about 25 degrees above the horizon. At that time Jupiter will just be coming over the eastern horizon. You will need a flat horizon to see it. As the month progresses Jupiter will rise higher in the east each morning. You can use the Moon to help you find the two gas giants. On May 13th the Moon is close to Saturn. On May 17th the Moon will be close to Jupiter. Again, the best time is about 30 minutes before sunrise.

Mercury will start out the month in conjunction with the Sun and will not be visible. As the month progresses it will gradually climb higher in the morning sky before sunrise, reaching greatest elongation from the Sun on May 29th. Look for it in the east about 30 minutes before sunrise.

Evening Sky:

Venus continues to dazzle in the western sky after sunset.

Mars continues to fade and drifts across Gemini this month. Telescopically the disk of the planet is less than 5 seconds of an arc in apparent diameter, making surface details very difficult to see.

 

Constellations:

 
NGC 4565 May 6th, 2016, 12.5 inch F/6 Newtonian Telescope and SBIG ST2000XCM camera. Total exposure time 5 hours. 
The views below show the sky looking east at 10:15pm EDT on May 15th. The first view shows the sky with the constellations outlined and names depicted. Star and planet names are in green. Constellation names are in blue. The second view shows the same scene without labels. 

A sure sign that spring is here is the rising of the bright blue-white star Vega in the early evening. Vega is the brightest star in Lyra, the Lyre, and it shines like a diamond in a small telescope. As spring progresses and Hercules rises higher in the sky, look for the globular cluster Messier 13 (M13), which appears like a small fuzzy patch of light about 1/3 of the distance from Eta to Zeta Hercules (see illustration below).  A cluster of stars about 21,000 light years away, M13 can be made out with the naked eye in a dark country sky when the constellation is high in the sky.  Binoculars will help pick it out.  The great Virgo cluster of galaxies is in a favorable position now, including NGC 4565 pictured above. 

 

May 15th, 10:15pm EST, Looking East

 

May 15th, 10:15pm EST, Looking East

On Learning the Constellations: 

We advise learning a few constellations each month, and then following them through the seasons.  Once you associate a particular constellation coming over the eastern horizon at a certain time of year, you may start thinking about it like an old friend, looking forward to its arrival each season. The stars in the evening scene above, for instance, will always be in the same place relative to the horizon at the same time and date each May. Of course, the planets do move slowly through the constellations, but with practice you will learn to identify them from their appearance. In particular, learn the brightest stars (Like Vega in the above scene looking east), for they will guide you to the fainter stars. Once you can locate the more prominent constellations, you can "branch out" to other constellations around them. It may take you a little while to get a sense of scale, to translate what you see on the computer screen or what you see on the page of a book to what you see in the sky. Look for patterns, like the stars that make up the constellation Hercules.

The earth's rotation causes the constellations to appear to move across the sky just as the sun and the moon appear to do. If you go outside earlier than the time shown on the charts, the constellations will be lower to the eastern horizon. If you observe later, they will have climbed higher. 

As each season progresses, the earth's motion around the sun causes the constellations to appear a little farther towards the west each night for any given time of night. If you want to see where the constellations in the above figures will be on June 15th at 10:15pm EDT, you can stay up till 12:15am EDT on May 16th and get a preview. The westward motion of the constellations is equivalent to two hours per month. 

 

Recommended:

Sky & Telescope's Pocket Star Atlas is beautiful, compact star atlas. 

A good book to learn the constellations is Patterns in the Sky, by Hewitt-White

For sky watching tips, an inexpensive good guide is Secrets of Stargazing, by Becky Ramotowski. 

A good general reference book on astronomy is the Peterson Field Guide, A Field Guide to the Stars and Planets, by Pasachoff.  The book retails for around $14.00. 

The Virtual Moon Atlas is a terrific way to learn the surface features of the Moon.  And it's free software.  You can download the Virtual Moon Atlas here.

Apps:  The Sky Safari 6 basic version is free and a great aid for the beginning stargazer. We really love the Sky Safari 6 Pro.  Both are available for iOS and Android operating systems.  There are three versions.  The Pro is simply the best astronomy app we've ever seen.  The description of the Pro version reads, "includes over 100 million stars, 3 million galaxies down to 18th magnitude, and 750,000 solar system objects; including every comet and asteroid ever discovered."

Another great app is the Photographer's Ephemeris.  Great for finding sunrise, moonrise, sunset and moonset times and the precise place on the horizon that the event will occur.  Invaluable not only for planning photographs, but also nice to plan an outing to watch the full moon rise.  Available for both androids and iOS operating systems.

 

Amphibians:

Bird-voiced Treefrog
By the end of May all of Tennessee's frogs and toads are either calling or have already reached their peak calling period and are being heard less. The treefrogs are the last of our frogs and toads to start calling. Cope's Gray Treefrog and Gray Treefrogs start giving isolated calls as early as late February, and by the end of this month listen also for Bird-Voiced Treefrogs, Green Treefrogs and Barking Treefrogs. In May we also hear Fowler's Toads calling frequently, so listen for their "crying baby" call. Eastern Cricket Frogs and Southern Cricket Frogs are hitting their stride as well. Listen for a sound like two stones being tapped together. We have heard eight or more species of frogs calling on some May evenings, so it's a great time to listen.  Upland Chorus Frogs and Spring Peepers continue to call. Listen for their calls to increase in pitch and quicken with the rising temperatures. 
 

Recommended:  The Frogs and Toads of North America, Lang Elliott, Houghton Mifflin Co.

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Nature Notes Archives:  Nature Notes was a page we published in 2001 and 2002 containing our observations about everything from the northern lights display of November 2001 to frog and salamander egg masses.

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