When we arrived at the project site, we wanted to see how the seedlings of trees and perennials had adopted and to assess the state of settlement of the constructed water reservoirs. We did not expect to see new species of birds while observing the area.
The biggest surprise for us was a pair of common terns (Sterna hirundo)! It is a protected species that is listed in the Birds Directive. This bird has a daily lifestyle and is usually gregarious. Therefore, we were surprised by the presence of only one pair of birds. Although cases of single pair of birds brooding and foraging are scientifically established.
For us, the observation of the common tern is valuable because this species is strongly attached to the hatching and nesting sites. This shows that the area of KSM Ruda is a long-term habitat of terns. German research shows that 66% of couples of terns remain faithful to each other for many years. That is why we are so glad that the island in the middle of the pond was taken by terns.
In Poland, it is considered that this species is endangered as a result of the liquidation of islands on large rivers and breeding ponds. Thus, our project has great potential for the protection of this unique bird species. We hope that in about 21-23 days (this is how long it takes for the eggs to hatch) we will be able to observe the feeding of the chicks by the parents. The broods on the island are protected from predators like: foxes, raccoon dogs or American mink.