As is normal for wagtails, Grey wagtails have a tendency to move their tails from left to right. You may also notice their unique flying pattern, which is to fly low in an undulating, bobbing manner; they often fly in this way while expressing their sharp, chipping calls. There’s a distinction between male and female Grey wagtails: males feature a bright yellow breast and black bib, while females are much less yellow and do not have the black bib.
In the garden it is possible to spot a Grey wagtail, though they are very few and far between. Should you see one, it is highly likely to have been drawn in by a specific water feature such as a pond. In fact, according to the RSPB, unless you have a stream running at the bottom of your garden, your best chance of attracting a Grey wagtail is to get out your spade and start digging a pond!
Grey wagtails are relatively rare birds with a population of just 38,000 breeding pairs in the UK. They are, subsequently, classified as Red Status due to this considerably low number.