AT THE MARTIN TOWERS

Purple Martin tower at Mud Lake Park

I had an opportunity this morning to watch the counting of eggs and nestlings of the Purple Martins down at Mud Lake by the Mississippi River. Together with some staff from the County Conservation and their kids we were invited to see how the nest gourds are maintained and kept clean during and after the time of incubation.

Ry, on the right, had lowered the gourd rack to the ground and then opened each one briefly. The kids helped counting and put the results in a tracking list for later evaluation. I was allowed to point the camera into the opening of one of the gourds so I can show you now how it looks inside with most of the martins already hatched.

Some of the chambers required a little more maintenance. When the nesting material was infested with bugs and possibly parasites, Ry carefully placed the young Purple Martins in a bucket for a short time, emptied the gourd, and replaced the old infested nesting material with new wood chips, or sometimes uses pine needles. This all happens calmly and relatively quick, so the gourd rack can be cranked up and the parents are able to feed the hungry bunch in the nests again.

It was an exciting experience, including some good conversation with everybody who was there. Thank you to Ry for a good explanation of the process and to Mike for inviting me!

Purple Martins at Finley’s Landing, 07/15/2025

SOCIAL LIFE AT THE MARTIN TOWER

Male Purple Martin returning to the nest

This is the photo I was hoping to get during my last two visits at the Purple Martin tower at Finleys Landing down by the Mississippi River. The Purple Martins are beautiful looking birds, elegant flyers, and it is very interesting to watch their social behavior. The young martins have hatched and it is such a great joy just to watch the interactions at a breeding tower.

For most of my wildlife photography I try to keep any men-made elements out of the frame, but here I make an exception, supported by a note I found on the Cornell website (https://www.allaboutbirds.org/guide/Purple_Martin/) :

Native Americans hung up empty gourds for the Purple Martin before Europeans arrived in North America. Purple Martins in eastern North America now nest almost exclusively in birdhouses.

With other words, we enjoy wildlife that has adapted to men-made nesting places since a long time. The towers hold 18 chambers for a Purple Martin nest and at Finleys Landing it looked like almost all were taken. These towers with their plastic gourds may look not very pretty, but the practicality for maintenance (cleaning after the breeding saison) and doing research studies (counting eggs, etc.) is proven. Well, most importantly the Purple Martins must like them and it is so exciting to see how quick the birds accepted the relative new tower at this location.

The nestlings peak out of the box but after the female on the left departed for catching more food, the male on the right pushed them back into the box with his head, I guess using his parent authority…

It seemed like some of the juveniles had already left the nest but this is a matter of interpretation. The juvenile Purple Martins look almost identical to the females that tend them. I’m not sure if this is a jealous female or a young one begging for food. Its clumsy behavior made me believe the latter.

Purple Martins are supposed to be monogamous but that doesn’t mean they can’t be jealous. The male in the center had a happy life until another male didn’t like it, flew in and used its bill vigorously to end the affair. It took less than two seconds and I shot this scene in high-speed shutter release mode with about 14 frames per second. Everybody left the scene uninjured… (June 28th, 2025)

BUSY PURPLE MARTINS

Male Purple Martin, Mississippi River, Mud Lake, Iowa

I still have a few photos from our recent trip to Minnesota but today I like to share some actual pictures that were made yesterday. I had received an information about the current breeding activities of the Purple Martins (Thank you Mike!) and went down to Mud Lake at the Mississippi River. Three days ago both breeding towers had more than 75 eggs and almost 30 nestlings had hatched already. The parents were very busy to feed and to guard each nesting chamber. I believe each tower holds 18 chambers.

Female with her latest catch at the martin house

I have plenty of pictures with martins sitting at the entrance of a nest box but I really wanted some shots with a bird in flight, approaching the nest or just hovering in front of it.

However, the second image shows a female with a dragon fly in its bill and waiting in front of the entrance hole of her nest. It took about four minutes before she turned around and entered the box to feed the offspring.

Female Purple Martin

If you are not familiar with the habits and biology of our largest swallow, you can find a lot of information about these birds on the websites of the CornellLab or the Purple Martin Conservation Association.

https://www.allaboutbirds.org/guide/Purple_Martin/

https://www.purplemartin.org

The Purple Martin is a very interesting bird and it is fun to watch how they catch all their food in flight and get their drinks by scooping water from the surface of the river or pond with their lower bill.

NATURE CLICKS #276 - PURPLE MARTIN

Female Purple Martin

Finding the Purple Martin is not a big problem along the Mississippi River. Most nest in colonies and use man-made birdhouses. Almost every boat landing, community, or park has them. We made another paddle tour in the Mud Lake area at the Mississippi yesterday and after the kayaks were loaded on the roof of the car I was able to photograph this species of the swallow family.

All images: Nikon D750, Sigma 50-500mm / f4.5-6.3 APO DG HSM, tripod, gimbal head, SB 800 speed light

Although the availability for natural nest cavities has declined over the years, the increased availability of human-provided nest sites has a positive effect on population. The Purple Martin competes with European Starlings and, as in the case of Mud Lake Park, with the House Sparrows for nest cavities. They share the big birdhouse at the boat landing with the sparrows, but as you can see in the second image it is not always a friendly relationship between these two species

Male Purple Martin

None of the photos would have worked very well without using fill flash. I just threw enough light at the birds to bring out the shadows and make the colors pop. It is a fine line and can be easily overdone.