The Southwest Driftless or non-glaciated Zone is shown in pink. The Northwestern Barrens and Forest is shown in purple or lilac. The Northeastern Forest zone is shown in green. The Central Agricultural zone with concentrations of wetlands and forest are shown in orange. These encompass the cool impacts from Lake Michigan shown in the light blue. The coloration of the map is my personal vision on how the state is divided by county lines for Purple Martins. Overall, for 2020, 86 people reported their first Purple Martin in Wisconsin. On April 6th and 7th, the front cleared and Purple Martins began flooding the whole state in the days and months following. It was not until three days later on April 5 that the first Purple Martins entered eastern Wisconsin. At that time, the eastern portion of Wisconsin was having east winds and a Low Depression stalled over Lake Michigan (Figure 1) while the other side had southerly breezes with warmer temperatures. Sightings occurred in Barron, Green Lake and Marquette counties. ![]() This had a big influence on their success throughout the breeding season contributing fledglings for the future.įrom the Purple Martin Association (PMCA) website for 2020, Purple Martins were first recorded in Wisconsin on April 2. For 2020, it was cooler and wetter than normal when Purple Martins came to Wisconsin in April, May and early June. Since Purple Martins have been with me forever, I want the information presented to be a static situation where we can evaluate and learn. When we reduce that variability by our actions as we address human features on them, are we then directing their populations to a suitable outcome for their benefit?Īs you see by my writings, I am trying to get all of us to appreciate Purple Martins as part of our environment. We need to follow the laws and regulations pertaining to the Migratory Bird Treaty both federally and within our state.įinally keep in mind that all Purple Martins need the greatest amount of variability to adapt. They are not owned by you but owned by all of us. Remember Purple Martins are wild birds that travel thousands of miles to another continent. This possibly may influence their genetics on how their future is shaped. Last of all Purple Martins are individuals and we as guardians over them do influence their life styles and behaviors on how we may manage them. Public versus private colonies are subjected in different ways and circumstances those Purple Martins are adjusted. ![]() They may or may not cause positive or negative values by what they do. ![]() Some colonies are only affected by the homeowner or colony landlord. Weather always plays a factor along with the age of the colony and its tolerances of human interactions. Larger colonies typically have more predation compared to smaller colonies and more interactions that are dynamic due to the habitat locally. I hope that it gives all of you a better insight of Wisconsin on how our Purple Martins are doing and may not reflect your own colony. This is our snapshot for 2020 given by over fifteen people with their data. ![]() They vary by region and by how each individual may have calculated their numbers given to me. Please note that statistics are representative for a time and place given by people throughout Wisconsin.
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