Look what cropped up

As you are laying out in the marsh, watching clouds roll by, waiting for the next batch of ducks to come into sight, do you ever wonder what they are looking for?

Why would a Mallard want to land right here? Do the decoys look “real”? Is it my amazing ability to mimic a seductive hen’s voice? Does that patch of corn or weeds look like an amazing buffet that is just too good to resist?

Well, like many questions that I ponder in the marsh, there probably isn’t one clear cut answer. Granted, a good stiff wind will aid in the motion and “realness” of my decoys. I could always improve on my calling skills. And depending upon a variety of factors the ducks may be looking for one type of food over another. As to which detail is more important at any given time, we will probably never really know.

Opportunistic diners

Waterfowl by nature are opportunistic creatures. The fact that they migrate thousands of miles to take advantage of seasonally flooded resources is proof of that. Another indication of the opportunistic nature of these birds can be done by taking a closer look at the digestive system and what they dine on. Ducks don’t have a true crop, but they do have extra storage capacity in their esophagus so they can cram a lot of food in during a short period of time and then take flight before becoming dinner themselves. The next organ is the crop, proventriculus is the more technical term, which starts to break down food items. Bugs deteriorate quickly here and may not make it to the gizzard, which is the next organ. This part of the bird is very muscular and essentially grinds up tougher foods, like seeds, with the help of ingested sand and pebbles.

Depending upon the season, availability, and the energetic needs, a Mallard’s diet will vary. Typically, early in the season moist soil seeds provide the energy and nutrients needed to sustain these birds. As conditions become harsher, “hotter” foods such as corn or acorns can provide the carbohydrates or energy that these birds require.

What were they packing?

Last week after a successful hunt I decided to take a look to see what the Mallards at Duck Creek had been dining on. After breasting out the birds, I examined the esophagus and crop within the duck's neck. This portion was clear of food, so apparently the birds I harvested had been roosting prior to being shot.

Continuing my search, I cut into the large, hard gizzard. Amid the gravel and grit, these birds had eaten a ton of dark round seeds with flat sides. These seeds belong to a species of smartweed, that grew up on Duck Creek despite the lack of management due to the ongoing construction. Nodding smartweed germinated in many of the hunting pools in Unit A and could have been seen in late summer with a long cluster of white flowers that droop or “nod”, hence the name. Their seeds are slightly smaller than another common smartweed, known as the Pennsylvania smartweed. Both are high in protein and contribute to a balanced diet for migratory waterfowl.

Most of the birds I harvested that day had nodding smartweed seeds in their gizzards, but one drake contained the larger Pennsylvania smartweed seeds. Perhaps he had spent a day down at Otter Slough or jumped over into a different habitat patch over at Mingo for a dinner the night before. Who knows…once again I find myself with more questions than answers.

Well, the next time you have a successful day out in the marsh staring at the sky, questioning, and shooting. Take a closer look at your harvested birds; who knows what will crop up.

Key Messages: 
Conservation makes Missouri a great place to hunt and fish.

Comments

Thankyou gentleman for your

Thankyou gentleman for your quick and accurate answers! The truth will set you free! Now we can only continue to hope for rain. Has anyone checked to see how much water is in pool 53 in b unit? Any huntable water that is!

The management plan for Pool

The management plan for Pool 1 states that minimum water level to sustain the fisheries resource is 342.5. We conferred with Fisheries staff in October to discuss plans for withdrawing water  to flood Pool 2 for waterfowl season and they expressed some serious concern of a winter fish kill if we lowered the reservoir water down to 342.5 and could not recharge some of the water prior to the possibility of freezing temperatures.  If ice covers the pool during such shallow water conditions and light cannot penetrate for several days, the plants will stop photosynthesizing and will begin to decompose which can deplete the dissolved oxygen levels causing a winter fish kill.  Current extreme drought conditions and the long term forecast predicting lower than average precipitation well into the winter prompted a compromise to raise the minimum pool level to 343.0 and to take only half of any water recieved above this elevation.  Pool 1 has been hanging close to 343.0 for the past month and finally was raised to 343.3 after this past 1.75" rain on 12/9.  0.15 feet of water from Pool 1 at this elevation is not enough to flood 1/4 of Pool 2.  The forecast is calling for a little more rain tonight and tomorrow and we will be closely montoring area water levels.

On October 4th cordek stated

On October 4th cordek stated any water in the lake over 342.5 would be diverted to pools 2 and 3. The lake is at 343.5. Why is that water not being diverted?

Pool 1 current water level is

Pool 1 current water level is 343.3 feet above mean sea level.  We received 1.75 inches of rain on Sunday, December 9th.

This weekend's rain bumped

This weekend's rain bumped the level of Pool 1 up 3 tenths of an inch. An occasional rain of an inch or two only replaces what we’ve lost since the small rain event due evaporation.  Several substantial rains will be needed to improve the drought conditions at Duck Creek and elsewhere in the state.

I wish people would stop

I wish people would stop griping every week about a lack of boats and try working a little harder for their birds. And as far as Pool 1's level, it would take 6 inches of rain to have enough to fill the other pools. Nobody is denying you any hunting opportunities, so get over it please.

As of 4:40PM 12-10-2012 what

As of 4:40PM 12-10-2012 what is the current lake level at duck creek?

Great article frank ....and

Great article frank ....and glad you had a good hunt

I would like to see some more

I would like to see some more boats crop up for use in Unit A and B How about you??? How much rain did Duck Creek get?