Last week, the title for my column was “Fall migration is in full swing at our local lakes.” As I was writing my column this week, I realized I could have used the same title again!
This past week, I have personally witnessed the impact of fall migration at several of our local lakes. Over the weekend I visited Willow Lake three times, and I visited Watson Lake, Goldwater Lake and the wastewater treatment plant on Sundog Ranch Road once each. It was fascinating to see how different migratory bird species showed up each day. I saw different species on Saturday than I saw on Friday, and different species on Monday from what I saw on Saturday.
On Friday, I birded the east side of Watson Lake from the vantage point of the Peavine Trail. When birding Watson Lake in the morning, it is best to bird from the east side of the lake so the sun is at your back. Using my 95-millimeter Swarovski scope made all the difference in the world, as birds on the lake and on the mudflats were pretty far away.
The higher magnification that a scope provides makes a big difference when attempting to see subtle differences in plumage and coloration. Identification of shorebirds in the fall can be tricky, as many migrating birds have already molted from their breeding plumage to their fall/winter colors — which tends to be more drab and subdued.
The water level at both Watson and Willow lakes is pretty low right now, so there are exposed mudflats that are being used by a variety of long-legged migrating shorebirds. At Watson I saw white-faced ibis, American avocets, killdeer, least sandpipers, western sandpipers, spotted sandpipers, Wilson’s snipe and Wilson’s phalarope. Each of these species feeds either on mudflats or in the shallow margins along the shore.
In addition to the many different types of water birds, I also saw a lot of migratory birds in the chaparral habitat that parallels the trail, including a vermilion flycatcher and my first sighting of a white-crowned sparrow this fall, along with migrating green-tailed towhees, Wilson’s warblers, yellow-headed blackbirds and bank swallows.
When I left Watson Lake, I drove directly over to Willow Lake and was again impressed with the variety of shorebirds that were present, including black-necked stilts, American avocets, killdeer, Baird’s sandpiper and pectoral sandpiper.
A return trip to Willow Lake two days later resulted in more, ‘new’ shorebird species, including a stilt sandpiper, solitary sandpiper, and greater yellowlegs — in addition to white-faced ibis, killdeer, black-necked stilt, Baird’s sandpiper, pectoral sandpiper, western sandpiper, spotted sandpiper and a sora. Wow, it was just incredible!
With such a variety of shorebirds, it was like an identification clinic where I could look at several different sandpiper species at the same time and compare important identification field marks such as size, bill color and length, and leg color and length, which believe it or not, are very important when identifying sandpipers — especially in fall plumage.
On Saturday, I visited the wastewater treatment facility on Sundog Ranch Road and saw a ring-necked duck, a few American wigeon and several northern shovelers. Just a few days earlier, none of these duck species were at this location. I also watched a peregrine falcon do a fly-by — it certainly got the attention of the birds feeding there! Yes, migration is in full swing.
As a reminder, the month of September is the submission period for our 12th annual Wild Bird Photography Contest. If you have questions, come by the store to pick up a flyer or go online at www.jaysbirdbarn.com for more information. The deadline to submit pictures is Sept. 30.
Until next week, Happy Birding!
Eric Moore is the owner of Jay’s Bird Barn, with two locations in northern Arizona—Prescott and Flagstaff. Eric has been an avid birder for over 50 years. If you have questions about wild birds that you would like discussed in future articles, email him at firstname.lastname@example.org.