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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.

April 2015

April 30
  April 2015 was about 2 degrees F warmer than "normal" and almost 40% below normal for precipitation. The result is a very dry condition and widespread high fire danger ratings and county or local bans of open fire. There was essentially no rain for the last 10 days of the month and only 0.55 inches in the last 20 days. The local forests are very dry and the spring flowers are at an all time low number on the UW-Green Bay Cofrin Arboretum.
April 29
The common "Gill-oer-the-ground" (Glechoma hederacea) is now flowering in our area.
April 27
Breeding behavior of Wild Turkeys is conspicuous in the Green Bay area, as here in Allouez.
April 25
We had White-throated Sparrows in our backyard this morning.
April 24
  Todays low temperature was 29° F, and the two previous days it was 32° F. For the fourth consecutive day the water in our bird bath froze this morning.
The flowers of cypress spurge (Euphorbia cyparissias) are emerging. The yellow structures are not really flower petals as they might appear to be. They are modified bracts, much the same as the conspicuous red portions of the traditional well-known Poinsettias. The flowers of Cypress spurge are small and they are not yet fully open. This is a troublsome invasive plant in our area.
April 23
Turkey Vulture flying over UW-Green Bay's Cofrin Arboretum
New leaves of red elderberry (Sambucus racemosa) are emerging rapidly.
April 21
  Green Bay's low temperature at the Weather Service station was 34° F. but somehow the water on our bird bath froze.
April 18

Photo at left is a nesting Canada Goose.

Several of the well-known spring wildflowers have begun to flower in the Brown County area, though it is only a small number of individual plants and only in a few areas. Among them are spring beauty (Claytonia virginica), bloodroot (Sanguinaria canadensis) and hepatica (Hepatica acutiloba). A little rain in the next few days should hurry the season along, when warm, sunny days return.

April 17
  Chinese juniper (Juniperus chinensis) has now begun to disperse pollen in Green Bay. It is an important source of spring pollen causing allergies.
April 16
Early leaves of toothwort (Cardamine concatenata),
and yellow trout lily (Erythronium americanum) are now easily visible in local woods.
April 15
  Wood and leopard frogs calling, painted turtle, garter snake, eastern comma and mourning cloak butterflies. Bay Beach, Green Bay. Submitted by Brian Pierce
 

WI-DNR reports Lake Sturgeon are now spawning in the Wolf River

April 14
Wild Turkey in our garden this morning, Allouez (Gary Fewless).
April 13
  Hermit Thrushes, Eastern Phoebe, Yellow-rumped and Palm Warblers, Tree Swallows, Vesper Sparrow. Baird's Creek, Green Bay. Submitted by Brian Pierce

The photo at left is of quaking aspen (Populus tremuloides) male catkins (aments) at UWGB. They began to flower there April 11.

April 12

The view at left is over the UW-Green Bay Campus toward the mouth of the Fox River.

There were a few dandelions (Taraxacum officinale) in flower today, but only up against the base of a south facing-wall.

  Wood Frogs calling today at UW-Green Bay, in Prairie Pond. The first I heard this year were in southern Brown County at Neshota County Park on 04/04 (Gary Fewless).
April 11
  Earthworm castings today, and the first 13-lined Ground Squirrel I've seen, Barkhausen Wildlife Preserve, Brown County (Gary Fewless).
April 7
  White Pelicans Over the Fox River in Brown County (Gary Fewless).
April 6
  First Great Egret of the year for me, near East River in Allouez. Also, there were 2 small flocks of Tundra Swans flying over Allouez, and others report same elsewhere in Brown County (Gary Fewless).
April 2
Green Bay still had a wide band of floating ice just two days ago, but is now ice-free at the UWGB shore.
April 1
This muskrat was swimming in Prairie Pond in UW-Green Bay's Cofrin Arboretum this morning.
The photo at left is an ament ("catkin") of a quaking aspen (Populus tremuloides) tree in the Arboretum.The flowers aren't actually open yet, but it is a sign that spring is probably not too far off.

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Last updated on May 20, 2015