While birding Lake Harbor Park
yesterday (May 18), I noticed this adorable little Barred Owl. Just hours out
of a nearby nest and only half-grown, this fledgling probably
could not yet fly. I took a few photos as I simultaneously scanned for the adults or a sibling, but I noticed neither.
Last year, the resident pair also successfully fledged young.
Due to its size and abundance of
hemlocks, Lake Harbor Park offers quality birding all year. The
informal trail system also provides pleasant hikes, although dogs can
be a little numerous. Because dead beeches are not culled, there is
ample habitat for cavity nesting birds, like this Barred Owl family.
On the other hand, habitat diversity across the park is limited, and
the understory is generally sparse. This situation has been
exacerbated by zealous neighbors who have further removed ground
cover in order to create a more "park-like" atmosphere. The
area just west of Glen Court, for instance, is quite absurd.
Furthermore, an over abundance of squirrels this past winter has
resulted in the loss of most red and sugar maple saplings, which
are killed as squirrels consume the inner bark. Consequently,
there are lots of migrant warblers using the park, but don't expect
low or close views.
Scarlet Tanager
When it comes to benefiting birds and
other wildlife, even land management decisions by professionals can
sometimes be misguided and exasperating, so having the ability to
manage your own yard allows you to be your own critic,
learn in the process, and reap the rewards. If birds are desired,
aesthetics, neatness, or decorations will have to be sacrificed in
favor of a somewhat unkempt or crowded ambiance. The precise
composition of plants can vary immensely, but species and structural
diversity are key. Personally, and depending on conditions, I am fine
with certain non-natives (e.g. lilac), but definitely avoid invasive
or nuisance species (e.g. bittersweet). The shelter and natural
forage provided by a good mix of conifers and hardwood shrubs brings
far more benefit than bird feeders.
To better assess how many birds such
tinkering has yielded, I sometimes extend my winter mist netting into
the spring. Some transients sing during spring passage, but the vast
majority do not. Plus, environments that best serve the refueling and
resting needs of migrants are not the easiest to bird. Banding helps
me track numbers.
Since even Chipping Sparrows are unusual in my yard (the only one I have recently banded was a bizarrely early bird on
2-18-14), I was surprised by this Clay-colored Sparrow on May 8.
Locally, the species is uncommon during the spring, but this date
lies squarely within their typical passage window. Breeding
Clay-colored Sparrows inhabit both dry coniferous scrub and shrubby
fields. I have found nests in Oceana and Mason Counties but not yet
in Muskegon County, though a few may breed here too.
Like Clay-colored Sparrow,
the Yellow-bellied Flycatcher also occurs as a regular but difficult to
find migrant. (Philadelphia Vireo and Gray-cheeked Thrush are
additional examples.) The species is also one of the latest to appear
in the spring, and sightings before May 15 would be quite unusual.
Whereas Least Flycatchers generally forage along forest edges during
migration, Yellow-bellied Flycatchers remain deeper beneath the
canopies of young hardwood forests. Consequently, they are almost
always heard before seen. On their breeding grounds (comprising boggy wetlands
heavily infused with young conifers and deciduous brush), they sing a
chunky "che-bunk" note that resembles a Least Flycatcher's.
Yellow-bellied Flycatchers sometimes utter this during migration, but
much more often they deliver their call, a melodic "du-wee".
This closely resembles the two-noted "per-weee" call of
migrating pewees, but it is shorter and less slurring. I had one calling
most of the afternoon in my yard on May 17, but it never found its
way into my net.
Another late arrival is Canada Warbler,
one of the final warblers to appear in the spring. While the species
has fairly general preferences during migration, on the breeding
grounds it favors a mix of dense balsam fir and various large trees
(overturned stumps are necessary for nesting). It often occurs at the
edges of the same bogs that Yellow-bellied Flycatchers utilize, and
across the Upper Peninsula, their populations are similar. As with
Clay-colored Sparrows, Muskegon County lies at the southern edge of
their breeding range, and in this area, hemlock thickets serve as a
proxy for balsam fir. The large eyes of the Canada Warbler are well
suited for life in these shady environments.
More so than other warblers, the
Magnolia Warbler shares an affinity for balsam fir and
hemlock. However, Magnolia Warblers rely less on large trees, and in
the U.P., they are five times as numerous as Canada Warblers.
The habitat similarity may explain certain parallels in appearance,
but the two species are not closely related. Among other differences,
Canada Warblers is a medium size warbler (averaging 10.4 grams),
while Magnolia Warbler (8.6 grams) is one of the smallest. A couple
traits make the Magnolia Warbler especially distinctive. It's call
note (a short, high, metallic screech) is quite unusual among warblers, and
so is the placement of it's tail spots - midway rather than at the
tip of the tail.
- Brian Johnson