Mid-March is when the first northbound Fox Sparrows show up in Massachusetts, and it’s always a pleasure to see this burly, richly-colored sparrow. I’ve been working on some new illustrations showing the variation among the birds in my yard this week. Regional variation in Fox Sparrow is extensive, and gets a lot of attention, with […]
Variation in eastern Fox Sparrows Read More »
Here is another recent project: I’ve been working on new and improved illustrations of Redwing for the bird guide and app, showing the differences between the two subspecies. The Redwing (Turdus iliacus) is a thrush common across Eurasia, from Iceland to Siberia. It is a very rare visitor to North America, mostly in Atlantic Canada
Distinguishing the subspecies of Redwing Read More »
Here’s a new illustration I’ve done as part of some work on distinguishing the two subspecies groups of Sandhill Crane. Six subspecies of Sandhill Crane are generally recognized, but for field observers it’s more practical to assign birds to two subspecies groups: Lesser and Greater. The Greater subspecies group includes five of the named subspecies,
Distinguishing subspecies of Sandhill Crane Read More »
Pine Siskins – streaky relatives of goldfinches – are so distinctive as a species that we tend to overlook their considerable individual variation. Siskins are unusual among the small finches in that males and females look nearly identical. Subtle individual differences in the amount or intensity of streaking, or in overall color, have no bearing
Variation in Pine Siskins and the so-called “green morph” Read More »
This recording includes one song of Cerulean Warbler and one of Black-throated Blue Warbler. Can you tell them apart? Distinguishing Black-throated Blue Warbler and Cerulean Warbler by song is usually not too difficult, even though both have buzzy songs with a more or less rising trend. The typical songs of both species are distinctive, and
A Cerulean-like song variant of Black-throated Blue Warbler Read More »
I always enjoy studying Herring Gulls, just looking at variation and trying to categorize the birds into age, sex, and regional groups. Last winter I was watching the gull flock at Turners Falls, MA, paying special attention to when the adults molted into breeding plumage. My thought was that the early-molting birds would be from
The head shape of Herring Gulls seems to change seasonally Read More »
I’m very excited to be able to announce the long-awaited launch of a new app – Song Sleuth – created by Wildlife Acoustics, Inc. It’s a bird song identification assistant, just a couple of taps and your iPhone will suggest what species of bird is singing. It covers nearly 200 of the most frequently heard
Announcing Song Sleuth Read More »
Song Sleuth main page Song Sleuth is a new bird song identification app, created by Wildlife Acoustics. Watch the detailed walk-through video You can find the app now in the iTunes app store. The Song Sleuth app can be very accurate, but it is also easily confused by extraneous sounds, and that can lead
Song Sleuth tips – How to crop a recording Read More »
In early December 2016, David Pierce of Wildwood, Missouri, noticed an odd woodpecker at his feeder and took some really nice photos. I always marvel at the path these kinds of stories follow: Dave had to be looking carefully enough to notice the slight differences in this bird, make the effort to take some good
A melanistic Downy Woodpecker Read More »
I wrote about white Great Blue Herons in 2007, and thanks to a recent comment there by David Ammerman alerting me to a whitish Great Blue Heron chick in a nest, I made the short trip to Bolton, MA yesterday (July 7, 2016). It was not hard to find the nest, and I was able
A white Great Blue Heron in Massachusetts Read More »