fall activity

Wood Thrush Notes

Fall Migration and BIRDCAST

Fall Migration is underway and while your seed and suet feeders will typically slow down now through October, birdwatching in the area will be significantly more interesting because migration is in full swing.

When spending time outdoors have your binoculars with you and ready because Warblers, Tanagers, Orioles, Rose-breasted Grosbeaks, and Flycatchers are pouring through middle Tennessee stopping to feed in the mornings on insects and berries, and at birdbaths. Pay particular attention to birdbaths and fountains as many of these birds seek out good water sources to take advantage of.

Mornings are best to see lots of different species because most migrants are traveling at night. They settle down to rest and feed in the morning.

Look for large if not massive flocks of Chimney Swifts and Common Nighthawk in the evenings commonly seen in areas near downtown or where there is ample night lighting like high school football games.

BIRDCAST

Did you know that radar used to track weather systems is also used to track bird movements? I suggest you check out BirdCast at birdcast.info. BirdCast is a project of the Cornell Lab of Ornithology, Colorado State University, and the University of Massachusetts Amherst. BirdCast applies weather surveillance radar to gather information on the numbers, flight directions, speeds, and altitudes of birds aloft in order to expand the understanding of migratory bird movement. Just last night, Sept. 28, an estimated 956,000 birds flew over Davidson Co.! And that number will increase as we approach the usual strongest time of migration in the month of October. BirdCast has live migration alerts in real-time and even projects what species are most likely flying over us on a given night. Their findings have been eye-opening and very interesting, to say the least. To summarize all the interesting information provided by BirdCast would be impossible. I urge you to check out this site. Wonderful!

Wood Thrush Notes

End of Summer-Early Fall Notes

We have received more than a few calls recently regarding the very noticeable slowdown at feeders in recent weeks. The degree of slowdown may vary each year but without a doubt September and October are the two slowest bird feeding months of the year. My 28 years of tracking sales data backs this statement up. We always sell far less seed and suet during these two months. So why does it slow down?

There are two reasons why feeder activity slows down at this time. Feeder activity is at peak level during the breeding-nesting season, between the months of March and July. We get used to the abundance of birds visiting our feeders and many of us are filling feeders frequently, every other day if not more. While nesting and raising young birds take full advantage, but do not rely on our feeders. Raising young takes a tremendous amount of energy and rather than having to forage for food at greater distances they will increase their visits to feeders exponentially, thereby staying closer to the nest and their valuable offspring. And many of our feeder birds will nest twice per breeding season. So, the first reason for the slowdown is the breeding season for our year round and summer resident birds has long been over, for at least a month and a half. The need for “extra” food has passed.

The second reason is by the end of summer and beginning of fall plants are producing seeds, nuts, and fruit. Beneficial insects chocked with protein are still very much available. Instinctually, birds cannot pass up the abundance of natural foods and variety now available. Therefore, the feeders that were important to them in the spring and summer become less important now. With no young to attend to they have little to do but feed on what nature is offering and to cache food for later use. Sure, you will still get birds visiting your feeders but not like during the breeding season. This would also explain why we rarely see Rose-breasted Grosbeaks at our feeders in the fall on their return trip to the tropics, when they are such prominent feeder birds in spring. Natural food is everywhere and unless something occurs to prevent food production, like a drought, birds will gravitate to it before going to feeders.

As much as the business owner side of me hates to see the slowdown I also appreciate the opportunity to point out birds do not rely on or survive on our feeders, as many people mistakenly believe.

Experience says by mid-November, or earlier if there are a couple of good frosts, you will see a return to busy feeders. So, don’t think something has happened to our birds. It really is just birds being wild animals acting on thousands of years of instinct. They will return to your feeders. By the way, this slowdown is a great opportunity to give your feeders a thorough cleaning.

Molting

Have you been finding feathers around your yard, or maybe seen some really funky looking Cardinals or Bluejays recently? Seeing Cardinals or Jays with an alarming lack of feathers on their heads is quite common after the breeding season.

Molting is the process by which birds lose damaged or worn out feathers with new ones providing them not only with healthy new feathers but often a new look to their plumage in the form of new colors or patterns that may indicate a bird’s age, sex, or season of the year.  Feathers are comparable to our hair or nails made from the same basic ingredient, keratin.  

Molt is not a “one size fits all” occurrence.  There is great variation by species and even by individual from year to year.  While molt is associated with this time of year any time a bird loses a feather a new one will immediately begin to grow in its place. 

Occasionally, Cardinals and Bluejays will lose all their head feathers in a short amount of time and while it takes a while for the new ones to grow in the result will be a bald bird.  I’ve seen a number of male Cardinals recently that were in between bald and the emergence of new feathers.  They look rather odd as their heads under the feathers are dark gray to black.

Molting Cardinal

Hummingbirds Getting Plump

I’ve seen some chubby hummers at the feeders lately as they continue to feed heavily and store fat for their long journey.  There’s plenty of time remaining to enjoy hummingbirds as they prepare for their return to Central and South America.  While you may have already seen a reduction in numbers of hummers at your feeders keep in mind Ruby-throated hummingbirds continue to head south from as far as Canada.  These very birds may show up at your feeders at some point weeks from now so keep the fresh nectar coming and your feeders clean.  Earlier in September I was in Maine and had several sightings of hummingbirds.  Isn’t it amazing when you consider the distance traveled by these little dynamos?

Wood Thrush Notes

Who’s Knocking?

It started recently and maybe you’ve noticed, maybe not. There’s a very audible “knocking” sound that seems to go on and on sometimes for several minutes at a time. The sound may be very close by, it may be deep in the woods, sometimes from multiple locations. It sounds like two pieces of wood rhythmically making contact. I’m embarrassed to say it took me awhile to figure this little mystery out. My initial thought was it’s a bird. The Yellow-billed Cuckoo, a bird that I hear regularly throughout the summer, makes a clucking sound yet it is distinctly different than the knocking I was hearing. And as I was hearing this knocking well into October and November it did not make sense that it would be a Yellow-billed Cuckoo as they migrate back to S. America in the fall. One day as I was working in the yard the knocking began right in my backyard. I grabbed my binoculars that I keep close and stalked into position to catch the culprit making the sound. It was a chipmunk.

Most information I could find on this behavior referred to the sound as a warning to other chipmunks that danger is present, like a hawk for example. It may very well be the sound is also being used to stake claims on certain areas. In the fall as chipmunks begin to gather food for the long winter they become highly territorial. The work of gathering and storing food can mean life or death for them. Turf wars begin and it’s every chipmunk for him or herself. Chipmunks do not hibernate but may stay in their dens for long periods of time only coming out briefly when temperatures are conducive to gathering extra supplies. They may even go into torpor, a slowed-down state, to conserve energy.

So if you have heard and wondered about the knocking sound you hear this time of year it’s the eastern chipmunk.

Many of us still have hummingbirds although their numbers are dwindling. Remember, there is not a time that you should take your feeders down. Hummingbirds will continue to move through middle-Tn during the month of October. Keeping at least one feeder available can be of great help to these tiny travelers.

Keep your eyes on your birdbaths as weary warblers look for water sources during migration. You just may be treated to one of the many beautiful species of warblers bathing and drinking in your yard.