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Observations by Gary Fewless for Green Bay WI (Lat.N 44.51° Long. W 88.02° ), except as noted. For flowers lacking conspicuous petals or sepals I define "anthesis" as release of pollen by mature anthers.

March 2007

Mar 30 Yellow-bellied Sapsucker and Brown Creeper, Town of Cooperstown, Manitowoc County (Joel Trick).
Mar 29

The day was warmer and sunnier than I expected. Populus tremuloides (quaking aspen) flowered (anthesis) widely in northeastern Wisconsin today.

First sighting of Mourning Cloak butterfly this year for me, Oconto County, Town of Doty. Also a single individual of Compon's Tortoiseshell.

I also saw a lot of this moth, Archiearis infans (the Infant Moth) in Oconto County. It is one of the earliest in the spring, a day-flying moth that overwinters as pupa. Food plant is generally in the Betulaceae (birch family).

Mar 26

Extremely warm weather continues. Green Bay's high temperature of 78° F broke the old record of 70° for this date, set in 1998! Virtually every reporting station in NE Wisconsin set a new high temperature record for the date, with Manitowoc reporting 79°, Oshkosh 80° and Appleton 81°. The long-term average high temperature for this date is 44°. The extreme warmth is all the more remarkable in view of the significant snowfall of 0.8 inches that fell overnight on the 18/19th just one week ago (see photo on March 19 below).

Eastern Phoebes have returned to Lakewood, Oconto County (Steve Janke).

Eastern Phoebe, Tree Swallow and Killdeer, UWGB (Tom Erdman).

Saw my first butterfly today around 2 oclock on this very warm day. A Cabbage White butterfly flew to a blooming crocus, City of Green Bay (David Parsons). [this is extremely early for this species, about 3 weeks earlier than the earliest I have observed on UW-Green Bay. It may represent release of reared individuals in this area or some other unusual circumstances, perhaps overwintering of horticultural Brassicaceae garden plants, ...GF]

There were Wood Frogs calling last night at Bayshore Pond and at Prairie Pond.  Many frogs were calling at each location, UW-Green Bay (Jenna King).
Mar 25

The first Alnus incana (speckled alder) are in flower (anthesis), City of Green Bay

Water Striders out on UWGB Campus, Mahon Creek.

First Corylus americana (American hazelnut) in flower (anthesis) UWGB.

Seedlings of Polygonum aviculare (knotweed) up, UW- Green Bay.

Green Bay's high temperature of 73 broke the old record of 69° for this date, set in 1939.

Mar 24

Lots of Tundra Swans on Green Bay, Pensaukee, Oconto County (Tom Erdman).

First calling spring peepers and wood frogs this evening, Town of Cooperstown, Manitowoc County (Joel Trick).

Mar 23 All the ice is off Prairie Pond, UWGB.
Mar 22

The earliest Acer saccharinum (silver maple) are in flower (anthesis). The average date of first flower for this same tree over the last 23 years is March 25 (but it has ranged from March 06 to April 05).

Woodcocks return; also some singing Wood Frogs. Both Pensaukee, Oconto County (Tom Erdman).

Last night's rains drove the last of the frost from the ground so the first harvest of the new garden year was today - the winter sweetened parsnips were dug today. Planted last spring they are this years first harvest and they are really sweet (Dave Parsons).

Mar 20

Yesterday's snow was gone by this morning on UW-Green Bay.

Acer saccharinum (silver maple) buds are swelling. The earliest trees will begin to flower within the next day or two in Green Bay.

Mar 19

A little new snow overnight in Green Bay (0.8 inches total), but warm weather is ahead. Today's high temperature was 49° F.

Mar 18 Woodchuck out and about, Shawano (Joel Whitehouse).
Mar 16 The East River was partially refrozen this morning in Allouez. Some of the ice blocks that piled up at the Mason Street bridge yesterday are still visible.
Mar 15

Most open lawns are snow-free in Green Bay, but there is still snow in shaded sites and where it drifted or was plowed deeper. Here are three photos illustrating how quickly the snow melted on UWGB's Cofrin Arboretum from March 12 to 15th.

There was a little light snow in the morning in Green Bay.

Song Sparrows returned, Pensaukee, Oconto County (Tom Erdman)

Mar 14

The ice came off the East River today. There were numerous chunks of ice floating downstream and the ice formed a partial dam at the Mason Street Bridge, but there was no serious flooding as a result. The ice didn't form fully on the East River until January 9 this winter, so the ice-covered period was only 66 days. On average the ice forms Dec 5 and opens March 22 (22 years of ice-out data and 16 years of ice-on data). The average ice-covered period is 108 days (15 years of paired ice-on/ice-off data). The ice-covered period has ranged from 62days (in 1997/98) to 148 days (1995/96).

This morning I observed the first American Robins and Song Sparrows of the season, Town of Cooperstown, Manitowoc County (Joel Trick).

Mar 13

What a difference a day makes! Compare the two photos of the Cofrin Arboretum from March 12 and 13.

Symplocarpus foetidus (skunk cabbage) in flower (anthesis).

Sandhill Cranes return, Oconto County, Pensaukee (Tom Erdman).

Mar 12

Red-winged Blackbirds returned to the marshes along the East River, Allouez, Brown County, Wisconsin. Also Brown-headed Cowbirds and Grackles in the area.

Red-winged blackbirds now widespread in the Green Bay area (Joel Trick).

First American Robin today, Casco, WI (Lisa Mastalir).

Common Grackles came to the feeder this afternoon. First time this season, Green Bay, (David Parsons).

Turkey Vultures returned, Pensaukee, Oconto County (Tom Erdman)

I saw a paper wasp, Polistes dominulus, walking about on the sidewalk, outside of ES Building on UWGB campus.

Green Bay reaches a high temperature of 52° F. I think that is the warmest temperature since last November 29th.

We also received 0.19 inches of rain.

Mar 11

Chipmunks out and about, Brown County (BobHowe).

New arrivals here today include common grackle and sandhill crane. Town of Cooperstown, Manitowoc County (Joel Trick).

Mar 10

Green Bay reached 45° F and snow is melting rapidly.

Chipmunks out and about, Oconto County, Pensaukee (Tom Erdman).

First Red-winged Blackbird observed, Town of Cooperstown, Manitowoc County (Joel Trick).

Mar 09

A high temperature of 44° F in Green Bay and melting of the snow has begun.

First Killdeers of the year seen at the edge of our office parking lot, northeast side of Green Bay (Joel Trick).

Mar 08 Low temperature of -2° and warmer weather predicted for tomorrow.
Mar 07 Green Bay received another 0.3 inches of snow and the low temperature was -5° F.
Mar 06 Winter made a brief return to Wisconsin. Green Bay received 3.6 inches of snow and the low temperature fell to -8° F with a high temperature of 15° F.
Mar 02 Light snow continues in Green Bay. It is decidedly wintery today, but warmer temperatures are predicted for next week and this is usually about the time we lose our snow cover and our version of spring begins.
Mar 01 Snow in Green Bay (2.2 inches) on top of the sleet and ice and there was even a little thunder as the big storm system slid slowly through our area..

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Last updated on April 17, 2014