There may be very little vegetation in cropland areas. The temperature of the water will be cold. Small numbers of invertebrates will be seen and collected. As the weeks pass, students will observe many changes. The water level, which was low during the first visit, will be even lower now.
Warmer temperatures help evaporate some of the water.
There may be a crop planted in the area surrounding the wetland. The temperature of the water will have become warmer. The warm water encourages invertebrates to become active. There may be large numbers of insects in the water. This is an excellent source of food for waterfowl, which may be more visible now than earlier in the project.