Across most of its European range, the most important predator of the Eurasian nuthatch is the sparrowhawk.
Other species known to prey on this nuthatch include the northern goshawk, hobby, tawny owl, pygmy owl and least weasel.
A Swedish study showed that 6.2% of the nuthatch nests in their study area were raided by predators.
The perpetrators were not identified, but the main single predator of tit nests in the same study was the great spotted woodpecker.

Common starlings will take over Eurasian nuthatch nest holes, reducing their breeding success.
This is most likely to occur if the nest is high in a tree and there is a good local breeding density of the nuthatch.
Introduced ring-necked parakeets may also compete with Eurasian nuthatches for nesting holes.
The parakeets tend to occur in fragmented urban woodlands, while nuthatches prefer large old oak woodlands, which reduces the level of competition.
Ornithologists conducting a 2010 Belgian study suggested that the problem was not so severe as to warrant culling of the parakeets.

Mites of the genus Ptilonyssus, such as P. sittae, have been found in the Eurasian nuthatch's nasal cavities.
Intestinal worms include the nematodes Tridentocapillaria parusi and Pterothominx longifilla.
Small studies in Slovakia and Spain found no blood parasites, but a larger Spanish survey found some evidence of Plasmodium infection.
Across most of its European range, the most important predator of the Eurasian nuthatch is the sparrowhawk. Other species known to prey on this nuthatch include the northern goshawk, hobby, tawny owl, pygmy owl and least weasel. A Swedish study showed that 6.2% of the nuthatch nests in their study area were raided by predators. The perpetrators were not identified, but the main single predator of tit nests in the same study was the great spotted woodpecker.
Common starlings will take over Eurasian nuthatch nest holes, reducing their breeding success. This is most likely to occur if the nest is high in a tree and there is a good local breeding density of the nuthatch. Introduced ring-necked parakeets may also compete with Eurasian nuthatches for nesting holes. The parakeets tend to occur in fragmented urban woodlands, while nuthatches prefer large old oak woodlands, which reduces the level of competition. Ornithologists conducting a 2010 Belgian study suggested that the problem was not so severe as to warrant culling of the parakeets.
Mites of the genus Ptilonyssus, such as P. sittae, have been found in the Eurasian nuthatch's nasal cavities. Intestinal worms include the nematodes Tridentocapillaria parusi and Pterothominx longifilla. Small studies in Slovakia and Spain found no blood parasites, but a larger Spanish survey found some evidence of Plasmodium infection.
Eurasian nuthatch