All posts by richardhoeg@gmail.com

Mississippi River Migration Cabin Escape

Molly and I needed an escape from the cold Northland. Cancer treatment had cancelled our winter and spring travel plans. I looked at a map and realized Dubuque, Iowa was straight south of Duluth. 6+ hours of driving would get us to the Mississippi River without any need to travel through the Twin Cities. Further research revealed a nice cabin overlooking the river on the grounds of a beautiful old estate which is now a foundation (Marvin Gardens Cabin at the Four Mounds Foundation … also a B&B in one of the former country estate buildings).

Image Courtesy of Four Mounds Foundation – Marvin Gardens Cabin


We had found the perfect 3 night getaway. We love cabins and it not only allowed us to cook our own meals, but kept Molly out of significant contact with other people given her weakened immune system. I would HUGELY recommend 4 Mounds to anyone. The grounds are gorgeous, and the John Deere Dike Park is only minutes away … a great spot for walking whether one is a birder or not, but during spring or fall bird migrations even better for the birder.

Some highlights of our cabin included a working stone fireplace, handsome wood decor, an antique wooden canoe hanging from the ceiling, Hudson Bay blankets, and even a 1911 Encyclopedia Britannica. As a fyi, I love reading encyclopedias and I spent time each evening with the over one hundred year old collect. It was pure pleasure for me! The cabin also had superb internet, and a remodeled modern bedroom / bathroom. I could go further with my explanation of the Marvin Gardens Cabin, but Molly is a much better writer than me:

I will however point out that the Dubuque John Deere Works are near by, and we enjoyed a superb free factory tour. The plant is right across the road from the Mississippi River and the John Deere Dike Park, which is my lead-in to Mississippi River birding at the park. The park has an easily walkable path which leads out onto the dike where the path turns north along the river. Your hike takes you in between wetlands, the river, and a small island. The area is excellent birding habitat, particularly waterfowl … once again think spring and fall migrations.

A few photos from my visits to John Deere Dike Park

Great Egrets and White Pelicans

Day #1 … in the Rain

Day #2 … Sunshine

Another popular hiking / birding area is just south of Dubuque … The Mines of Spain Nature Center & Recreation Area. There is an extensive trail system, and a short hike yields some amazing views out over the bluffs and Mississippi River.

Mines of Spain Overlook

Sax-Zim Bog Predators

My daughter’s plan was to visit us today … arriving up from the Twin Cities around 9:45 am. Thus, naturally I thought that meant there was time to go birding at Sax-Zim Bog before she arrived. I left home at 5:25 am, and the Bog did not disappoint. Predators like to nest or have their young early in the year to make their youngster’s huge appetites correspond to when other animals and birds have their young.

I found another Great Gray Owl hunting well past sunrise. I suspect it is now hunting for two adult owls … itself and its mate which is back on the nest. Thus, the two Great Grays I have found in dramatically different parts of Sax-Zim now gives me a good idea where of the vicinity of two owl nests.

With respect to Red Fox, their young were born some time ago, and the fox kits are starting to come out and play. Apparently foxes like the same forest region as one of the owls. The Red Fox and Great Gray were seen and photographed quite near one another! Wherever you live it is time to invest in searches which will pay dividends in 6 to 8 weeks. Days following stormy weather (like yesterday) are always a smart time to head into the outdoors. Predators are likely to be hungry after a forced day of fasting.

Branching Owlet (Trunking??)

Great Horned Owlets are known to “branch” at approximately 40 days of age, but what is an owlet supposed to do if one’s nest is only a cavity without branches? Trunk!!!

A few days ago when I hiked over to visit the owlets shortly after sunrise I discovered there was “trunking” go on! Enjoy!


Nesting Timeline from the Cornell School of Ornithology: (directly quoted)

Day 1: The chicks are unable to raise their heads and will lie limp for the first few days after hatching. At hatching the young are covered with white down, which is initially wet but dries quickly. Legs and skin are pink. They depend on their parents to bring them food and to feed them. Young show remnants of the yolk sac and retain the egg tooth for four to six days. Eyes stay closed for 9 to 11 days. The young crawl beneath their parent, grasp weakly, swallow, and gape on the first day.

Day 3: The young will start to raise their heads.

Day 6: The young will start snapping their bills.

Day 7: Young are able to cast their first pellets.

Day 9: Eyes may start to open.

Day 14: The owlets are able to locate the parents by sound. They will respond with food calls or whimpers when the adults hoot.

Day 15: The young will start to exhibit hostile behavior when intruders approach the nest. They may hiss, sway from side to side, snap their bills, and raise their wings.

Day 19: The young will start trying to focus on objects with exaggerated head movements.

Day 21: The young start to become more and more curious and begin to grasp objects in the nest and nibble them.

Day 20-27: The owlets are able to feed themselves, with food brought to the nest, although the female parent may continue to feed them.

Day 40: The young are able to climb well, at which time they may leave the nest and clamber out along a tree branch. This stage is known as branching.

Day 45-49: The young are fully feathered and capable of flight.

At seven weeks the owls are capable of three to four short flights of diminishing distance as they tire easily.

After leaving the nest, the fledglings stick together for several weeks. They often roost together in a tree in the immediate vicinity. Adults generally roost away from the young, who react to the sight of the adults with begging calls and flights towards the adults. Adults bring their young occasional food items, even into September, and deposit them, leaving the young to dismember and swallow the prey on their own.


Amity Great Horned Owlets …

35 Days Old (my best age guestimate of the oldest owlet)

36 Days Old