Wednesday, October 25, 2017

Changing Seasons in the Park: Summer to Fall, by Nancy Barrett




Goldfinch
American Goldfinch with thistle seed, late August.
Although Spring’s explosion of greenery after a long winter, the return of songbirds, and the promise of new life makes it my favourite season, the transition into Autumn runs a very close second.  From August through November, growth cycles may be winding down, leaves are falling, and many birds desert us for the warmer south, but there is still much to see and experience at Colonel Samuel Smith Park.  I’ve captured some of my favourite images during this season, and would like you to join me on a visual journey, with images gathered from my visits to the park over the years.
Early autumn meadow

This truly is a season of change…suddenly, large swaths of meadow turn bright yellow with goldenrod and counterpointed by the mauves of the asters.  The greens of summer are accented with the bright tones of butterflies and the reds of staghorn sumac.  There is no subtlety to the colours of autumn, making it hard to be sad about summer’s departure. These wildflowers, plants, and shrubs are among those inextricably connected with two important migrations that take place at this time:  Those of birds and Monarch butterflies. This time we’ll talk about the many birds that use the different habitats at Colonel Samuel Smith Park as a stopover to feed and rest, as well as some of the park’s resident species.

There is a “winding down” feeling, what with the frantic business of constructing nests, incubating eggs, and feeding young finally ending.  Birds who breed in the park, like the Red-necked Grebes, are usually feeding large chicks and have abandoned their nesting platforms in the harbour–which are then immediately taken over by cormorants as roosting rafts.  I have come across grebes with downy chicks in September; these little ones have to grow quickly before it’s time to leave in late fall.

  Above, a Red-necked Grebe family in September; below, a still-stripey juvenile being fed


Many species of birds that breed as far north as the Arctic circle follow the same routes south each late summer and autumn, following food sources and weather patterns.  The pure insectivores (swallows, swifts) are among the first to leave, followed by thrushes, warblers, vireos, flycatchers, hummingbirds, sparrows, creepers, and kinglets.  Some species that usually eat insects adapt to consuming berries or seeds; they need as much nutritious food as possible to survive their long journey.
Palm Warbler
Many young birds are still trying to grow quickly enough to be able to escape the cold winter weather; young goldfinches and cardinals are often heard into October, still begging for food from their parents. Juvenile raptors (hawks, falcons) and fish-eating waterbirds (herons, egrets, cormorants) are still learning to hone their hunting skills.  Quite a few warblers and vireos moult into drab winter plumage, making field identification difficult, and immature birds can add even more confusion.
Bay-breasted Warbler, September

Blue-headed Vireo, October

Immature Common Yellowthroat, September

Fall migration for many songbirds lasts longer but is more “stretched-out” than it is in spring, beginning in August but lasting to late October.  Yet on favourable days with SE tailwinds, the trees and shrubs can seem to be swarming with different species, similar to spring.  Late-departing Golden-crowned and Ruby-crowned kinglets dart around, making their distinctive three-note, reedy calls.

Golden-crowned Kinglet

Winter Wren

Migrating sparrows of different species will mix together and the underbrush can seem alive with them.  On warm fall days, male White-throated Sparrows will occasionally sing their spring song; chickadees, cardinals and robins do the same.

White-throated Sparrow, November
Swamp Sparrow, October
Immature White-crowned Sparrow, October

American Goldfinches nest late in the park and surrounding areas, ensuring that there will be an abundance of thistle and milkweed seeds for both nesting material and to feed their young.  Rather than migrating far south, goldfinches move southward where the average January temperature is no less than -17C.

Immature American Goldfinch feeding on 
Spotted Knapweed, August

Every fall, in early October, American Pipits stop by along the rocky outcroppings in the park to pick around for insects and seeds.  They’re returning from the high tundra, where they breed in summer.

American Pipit

Even though the park doesn’t have the best shorebird habitat, some migrants still stop in along the beaches to rest and feed in the fall.

This Greater Yellowlegs was catching small fish in the pond in early November

A single Sanderling on the beach in September

Double-crested Cormorants begin leaving, and diving and dabbling ducks and other waterbirds begin to move through.  Diving ducks can form huge staging flocks just offshore, and take advantage of the good feeding in the harbour and the pond.

Double-crested Cormorant in the mist
American Coot with maple leaf
Northern Shoveler drake
Northern Shoveler drake
A drake Hooded Merganser catches a hefty fish. November
Great Blue Heron
A female Belted Kingfisher watches the pond for her next meal
This usually shy Adult Black-crowned Night Heron was patiently waiting for a fish just off the observation platform

Sometimes, the internal navigational wiring is faulty, and some birds wander far from their usual home ranges; sometimes, high winds from hurricanes in the southeast will blow rare and unusual species off course and into our back yard.  Col. Samuel Smith Park is no stranger to visits from rare birds; birders and photographers will often travel far to see them and add them to their life lists.

This Cattle Egret, native to southern US states, Central and South America, turned up in fall last year and remaining for weeks, happily eating grasshoppers and fishing
This immature Yellow-crowned Night Heron, a rare visitor from the south-central U.S., attracted lots of birders in late August and September 2014

Not a rarity but rarely seen due to their secretive habits, usually hidden behind tall wetland reeds, Least Bitterns have been recorded in late summer/fall for several years now.

A juvenile Least Bittern, October 2014
This is an adult Least Bittern that was seen in the same area one year later.

Nesting near or in the park and always watching with sharp eyes are the avian apex predators such as Peregrine Falcons and Cooper’s Hawks, looking for careless birds.  Occasionally, migrating Ospreys stop by for a quick seafood meal. 

This Peregrine Falcon was enjoying a bath in early November during a break from hunting. This is “Lucky”, who rules the roost at the Islington and Bloor nest site
This Osprey made a successful catch in the yacht harbour
Adult Cooper’s Hawk, November
Green Heron fishing on a foggy morning

Join me next time for an article on the great Monarch butterfly migration in Col. Sam Smith Park and more.



1 comment:

Unknown said...

Cool blog and captures! I initially noticed you "Merganser with hefty fish" shot. Wow that looks like a large (do you know what kind?) potential meal staring down it's captors throat here!

So could the bird really manage to win the struggle and gulp that whole thing down okay? Does the fish put up a good fight, if eaten, does the unlucky prey get swallowed wriggling all the way as well?!