April 9-15, 2018 (Week 15 of 52): The Advance of Spring will Resume Later this Week

041114_ 028

Flooded wetland, at annual high water mark.

Photo 013 (2)

Caddis fly case, found in forested wetland (Erie Co)

Photo 010 (Cropped)

Spring peeper found along wetland edge (Erie County)


Painted turtle on log.

Photo 020

Migrant northern saw-whet owl in daytime roost (Owl Woods, Braddock Bay)

While the Buffalo-Niagara Region is currently stuck in a rut of below average temperatures, the weather forecast of above average temperatures starting on Thursday assures a return to spring. Those warm temperatures will bring early blooming trees and shrubs (e.g., red maple, silver maple, pussy willow) and wildflowers (e.g., skunk cabbage, coltsfoot) out of their current state of suspended animation.  We may even see the earliest of our spring ephemeral wildflowers, sharp-lobed hepatica and bloodroot, starting to bloom in some areas later this week.  Early breeding species of frogs and salamanders will continue to migrate to and breed in vernal pools and other ponds/wetlands.  Southerly winds associated with the warm-up will carry more northbound migrant birds into and through our region.

Below are highlights of what you can expect to find outdoors in the Buffalo-Niagara Region this fourth full week of spring. Those in bold/italics are new highlights to watch for this week.  Check out the list of 300 publicly accessible sites (“B-N Region & Sites” tab on this web page) to find areas to explore in your neighborhood and throughout the Buffalo-Niagara Region.

Average Sunrise/Sunset (Day Length):

  • 6:38 AM/7:55 PM DST (13 Hours, 17 Minutes)
  • 4 Hours, 16 minutes of daylight longer than at Winter Solstice
  • 1 Hour, 17 minutes of daylight longer than at Vernal Equinox

Typical Weather:

  • Normal High Temperature: 53.5° F   Normal Low Temperature: 35.6° F
  • Cumulative Growing Degree Days thru April 2, 2018: 14

Lake, Pond, Stream & Wetland Conditions:

  • The west end of Lake Ontario and the east end of Lake Erie are mostly ice-free.
  • The Lake Erie water temperature off Buffalo was 32°F and the Lake Ontario water temperature off Greece (Monroe County) was 37°F as of April 9.
  • Inland ponds, wetlands, and vernal pools are ice free and near annual high-water levels.
  • Streams will continue with moderate to high flow levels this week.

Woodland Wildflowers:

  • Skunk cabbage will continue to flower in forested wetlands, approaching its peak blooming period late this week.
  • The earliest of the spring ephemeral wildflowers, sharp-lobed hepatica and bloodroot, may start to bloom in some areas late this week.
  • Wild leek leaves will emerge in some upland forests late this week.
  • Coltsfoot, a non-native species that has naturalized across the region, will continue to bloom this week. Look for its yellow, dandelion-like flowers.
  • Lesser celandine, an invasive non-native species of buttercup, will begin to bloom in some areas late this week. It is most common in floodplain forest habitats.

Trees and Shrubs:

  • Sap is flowing in trees and shrubs, as visualized by brighter yellow branches of crack and other willows and redder branches of red osier and silky dogwoods.
  • Red and silver maple trees will approach peak flowering late this week.
  • Pussy willows will continue to “flower” across most of the region, soon developing stamens that will produce pollen.
  • Some quaking aspen, big-toothed aspen, American elm, and eastern hophornbeam may start to flower late this week.

Insects & Other Invertebrates:

  • A surprising diversity and abundance of vernal pool invertebrates will continue as pools warm: fingernail clams, amphipods, isopods, fairy shrimp, caddis fly larvae, dragonfly nymphs, giant water bugs, an assortment of aquatic beetles, etc.
  • Early spring species of caddis flies, stoneflies, and midges will continue to emerge from streams and be active when air temperatures are about 40°F and warmer.
  • Watch for honeybees and native bumblebees visiting newly blooming flowers late this week.
  • Wooly bear caterpillars that overwintered beneath leaf litter will continue to be active on warm days. After a brief feeding period, each will spin a cocoon of their orange and black hairs and develop into an Isabella tiger moth.
  • Mourning cloak and eastern comma butterflies (which overwinter as adults) may become active during the relatively warm weather forecast late this week.
  • Common green darners may start migrating back into our region from the south late this week, typically the earliest dragonflies to be seen here.


  • Northern pike are concentrated in tributary streams, ditches, and shoreline wetlands for spawning.
  • White suckers will continue to migrate upstream within Great Lakes tributary streams to their spawning grounds.
  • Fresh steelhead will continue to enter tributaries for spawning when conditions are favorable. Steelhead are an anadromous form of rainbow trout that spawn in streams but live most of their lives in Lakes Erie and Ontario. All forms of rainbow trout are native to Pacific coast watersheds.
  • Walleye and yellow perch will be moving into shallow waters to spawn.
  • Large schools of alewife will continue to move from cold depths of Lakes Erie and Ontario to nearshore areas in preparation for spawning.
  • Large runs of brown bullheads will continue to enter tributary streams and harbors.
  • The DEC will continue to stock some local streams with hatchery-raised brown, brook, and/or rainbow trout this week.

Amphibians & Reptiles:

  • Early breeding frogs such as the wood frog, western chorus frog, and spring peeper will continue to vocalize and breed in wetlands and vernal pools, especially late this week.
  • Northern leopard frogs and American toads may migrate to breeding pools following rain forecast late this week and join the frog chorus.
  • Spotted, blue-spotted, and Jefferson’s salamanders will continue to breed in vernal pools.
  • Eastern (red-spotted) newts will continue to migrate to breeding ponds this week where they join newts that overwintered in the ponds.
  • Lungless salamanders (e.g., red-backed, northern slimy, northern dusky, mountain dusky, and two-lined salamanders) will become active this week. They can be found under rocks and logs during the day.
  • Eastern garter snakes will emerge from hibernation/brumation. Watch for “snake balls” – breeding clusters consisting of multiple males attempting to mate with a single female.
  • Watch for painted turtles basking on logs, especially during cool but sunny periods.

Water & Shore Birds, Gulls & Terns:

  • Larger numbers of American coots and “puddle ducks” such as the northern pintail, American wigeon, mallard, American black, gadwall, northern shoveler, redhead, ring-necked duck, blue-winged teal, green-winged teal, ruddy duck, wood duck, and hooded merganser will continue to stop-over in the region as they migrate north, or return to local breeding areas.
  • Some early breeding ducks such as mallard and wood duck may already be incubating eggs. Don’t be surprised to see wood ducks perched in trees, near nest cavities, this time of year.
  • Pairs of Canada geese will continue to nest in ponds and wetlands.
  • Great blue herons will continue to nest on Motor Island in the Niagara River, as well as inland nesting areas (rookeries).
  • Black-crowned night-herons will gather at nesting areas (rookeries), including a large rookery on one of the small islands just above the brink of Niagara Falls.
  • Watch for additional migrant and summer resident water birds such as the common loon, double-crested cormorant, American bittern, pied-billed grebe, and horned grebe this week.
  • Bonaparte’s gulls will continue to enter the region, using the Niagara River as a significant stop-over feeding area along their migration route north. This species will reach its peak spring numbers in the region in mid- to late April when thousands will be present along the Niagara River.
  • Watch for Caspian terns, the largest of the tern species to commonly occur in the region, along the Niagara River and Lakes Erie and Ontario late this week.
  • Killdeer pairs are courting this week and some may be nesting.
  • Male American woodcock and Wilson’s snipe will continue to perform their elaborate aerial displays designed to attract mates. Some hen woodcock and snipe are already incubating eggs.
  • Other early migrant shorebirds may arrive in our area this week: greater yellowlegs, lesser yellowlegs, and spotted sandpiper.
  • To stay abreast of bird sightings in the region, consult eBird, Genesee Birds, and Dial-a-Bird (see the “Resources” tab on this web page for more details).

Birds of Prey:

  • Some winter resident raptors (e.g., snowy owl, short-eared owl, rough-legged hawk, northern harrier) will continue to linger in the region, especially in areas with extensive open grassland habitat. Most will leave for northern breeding grounds over the next week or two.
  • Spring flights of hawks, falcons, eagles, osprey, and turkey vultures will continue to follow the Lake Erie and Lake Ontario shores as they migrate north. An excellent observation area for seeing hundreds (sometimes thousands) of these migrants in a single day is Lakeside Cemetery in Hamburg.
  • Northbound long-eared owls and northern saw-whet owls will continue to arrive in the region, most notably near the southern shores of Lake Erie and (especially) Lake Ontario.
  • Year-round resident raptors such as the great horned owl, barred owl, eastern screech owl, bald eagle, peregrine falcon, and red-tailed hawk are paired up and many are already on-nest. Red-shouldered hawks, a species that migrates south for the winter, may also have nests with eggs.
  • Most year-round resident birds of prey are already on-nest. Recent arrivals such as the red-shouldered hawk, Cooper’s hawk, sharp-shinned hawk, American kestrel, and osprey will be establishing nesting territories.

Upland Game Birds:

  • Wild turkey toms, with colorful heads and fanned tails, will intensify their courtship displays to hens.
  • Listen for drumming displays by male ruffed grouse in the southern part of the Buffalo-Niagara region as well as the Alabama Swamps area.
  • Male ring-necked pheasants that have become naturalized in the region will continue their rooster-like crowing to establish territories and attract mates. Some hens may be laying eggs at this time.


  • Typical winter songbirds such as the dark-eyed junco and American tree sparrowsback, scaup, common goldeneye, common merganser, long-tailed duck plus less common species such as the pine siskin and common redpoll will continue to visit local bird feeders. Most will leave for northern breeding grounds over the next two or three weeks.
  • Watch for early migrant feeder birds such as red-winged blackbird, common grackle, brown-headed cowbird, purple finch, song sparrow, white-throated sparrow, fox sparrow, and chipping sparrow. Be sure to place seed such as white millet in ground feeders or directly on the ground to attract these migrants.
  • Additional early migrant songbirds will continue to arrive in the region:   brown creeper, golden-crowned kinglet, ruby-crowned kinglet, eastern phoebe, tree swallow, barn swallow, rough-winged swallow, purple martin, winter wren, northern flicker, yellow-bellied sapsucker, American pipit, hermit thrush, brown thrasher, yellow-rumped warbler, pine warbler, rusty blackbird, eastern (rufous-sided) towhee, white-throated sparrow, fox sparrow, chipping sparrow, field sparrow, swamp sparrow, and savannah sparrow.
  • Early breeding songbirds such as the mourning dove, blue jay, American crow, horned lark, white-breasted nuthatch, Carolina wren, American robin, eastern bluebird, European starling, song sparrow, northern cardinal, common grackle, house finch, and house sparrow may already be incubating eggs. Others will continue to sing, establish territories, and court as they prepare to nest.


  • Male woodchucks will continue to emerge from hibernation and seek to mate with females as they emerge from their winter dens.
  • An occasional big brown bat may emerge late this week from hibernacula in local attics etc. and be seen foraging for insects.
  • Other true hibernators (several species of bats, meadow jumping mouse, and woodland jumping mouse) will continue to be mostly inactive in the region during the coming week.
  • Ermine (AKA short-tailed weasel) will continue to molt from white to brown pelage.
  • Newborn opossums will continue to suckle from the safety and warmth of their mother’s pouch. A single litter often consists of over a dozen young.
  • Most eastern chipmunks have emerged from winter torpor will continue to actively feed and breed this week.
  • Gray squirrels, red squirrels, and southern flying squirrels will give birth to the first of two litters of young at about this time.
  • Yearling beavers disperse from natal ponds to establish their own territories at this time. Now is an especially good time to find scent mounds marking beaver territories, typically along edges of beaver ponds.
  • Eastern cottontails will give birth to the first of three litters of young at about this time.
  • Coyotes and red & gray fox give birth to pups at about this time.
  • White-tailed deer will continue to travel in herds. Finding food will continue to be difficult until the growing season begins.

Be sure to find an opportunity to get outside this week to discover signs of spring.

Chuck Rosenburg


One thought on “April 9-15, 2018 (Week 15 of 52): The Advance of Spring will Resume Later this Week

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s