Seasonal guide · Canada
Trimming Hedges in Nesting Season: What Canadian Law Says
IllustrationYes, you can trim a hedge in nesting season in Canada. You just can't harm an active nest. Federal rules protect migratory bird nests that hold a live bird or an egg that can still hatch. Environment and Climate Change Canada says nesting can start as early as mid-March and run until late August. So check the hedge first, trim around any active nest, and come back once the young have gone.
What does the law actually protect?
The main law is the federal Migratory Birds Convention Act. Its rules are in the Migratory Birds Regulations, 2022. Environment and Climate Change Canada sums it up in one line. Migratory birds are protected at all times. Their nests are protected when they hold a live bird or a viable egg.
The rules say you can't damage, destroy, disturb or remove a nest like that. Note the word "disturb." You don't have to cut the nest to break the rule. So keep loud tools and shaking branches away from it too.
Most of the birds that nest in a backyard hedge fall under this law. The federal list covers robins and thrushes, sparrows, finches, hummingbirds and catbirds, among many others. Canada's own FAQ names the American Robin as a protected bird.
What about birds the federal law skips?
Some birds aren't on the federal list. Hawks and owls are two examples. Canada says those birds are now protected under provincial and territorial laws instead. So a nest can still be off limits even when the federal Act doesn't cover that bird.
When is bird nesting season in Canada?
Environment and Climate Change Canada gives a general nesting period. It can start as early as mid-March and run until late August. The period starts when the first eggs are laid. It ends when the young have left the area around the nest.
Two more details from the same page are worth knowing:
- The dates can be off by 10 days or more.
- Birds can nest before or after those dates. The chance of finding an active nest is much lower then, but it isn't zero.
- Canada asks people to use extra caution at the start of the period, when early nesters are setting up.
So the law doesn't switch off on September 1. A late nest in a cedar row is still protected if it has eggs or young in it.
Is it illegal to trim a hedge between March and August?
No. There's no federal ban on hedge trimming in spring or summer. The rule is about nests, not calendars. You can trim any part of a hedge that doesn't hold an active nest.
Canada's guidance does say the best way to avoid harming nests is to skip harmful work during breeding season. That's why timing helps so much. A main trim in early spring, before most birds settle in, is the easy way to stay clear. Our post on when to trim cedar hedges covers the best timing for cedars.
A light summer touch-up is fine too. Just check first, every time.
How do you check a hedge for nests before trimming?
Here's the catch. Canada says nests are very hard to spot, and searching can do harm. Pushing into a hedge can flush the parents. That raises the risk that predators find the eggs, or that the adults leave the nest for good.
So don't dig through the hedge with your hands. Watch it instead:
- Stand back a few steps and watch the hedge for a few minutes.
- Look for birds flying in and out of the same spot again and again.
- Listen for chirping young from inside the hedge.
- Watch for a bird carrying grass, twigs or food into one place.
- Do this again on trim day, even if you checked last week.
If you see any of those signs, treat that section as off limits.
What should you do if you find an active nest?
Canada's guidance is clear on this. Stop the work near the nest. Move away quickly and quietly. Then leave a buffer around it until the young have left on their own.
- Trim the rest. You can still trim the parts of the hedge well away from the nest.
- Leave a wide gap. Don't run a loud trimmer right next to it. The noise and shaking can disturb the birds.
- Don't tie tape on it. Canada says flagging tape can help predators find the nest. Just remember where it is.
- Come back later. Once the young are gone and the nest is empty, finish that section.
A shaggy patch for a few weeks won't hurt the hedge. It's the simple fix.
Can you remove an empty nest?
For most birds, yes. Federal rules protect a nest while it holds a live bird or a viable egg. Once it's empty, the nests of most species can be removed.
There are exceptions. The nests of 18 species on Schedule 1 of the regulations are protected all year. Those can only be removed after a notice to the Abandoned Nest Registry and a set wait time. If you aren't sure what bird built the nest, leave it alone.
You're also allowed to discourage a bird from building in the same spot again. The catch is that it can't disturb or harm the bird.
Does Ontario add its own rules?
It does. Ontario says that in some cases you need ministry approval to remove or disturb a wild bird's nest. That covers nests birds are using, with or without eggs. Ontario lets you remove nests of a few birds without approval: the American crow, brown-headed cowbird, common grackle, house sparrow, red-winged blackbird and European starling. Other provinces have their own laws, so check yours before you take any nest down.
What happens if you destroy an active nest?
It can mean a fine. The federal rules set fines on conviction for individuals, and they double for a second offence. You can only get a permit in limited cases, like damage or danger, and only if you own, lease or manage the land.
Most people never come close to this. A quick look before each trim is all it takes.
How does a hedge trim work with a crew?
Golden Oak Lawn Care matches you with a vetted, insured local partner crew. They do the work. We stand behind it with the Golden Oak Guarantee.
Your crew handles hedge and shrub trimming. In nesting season, they watch the hedge before they start. If they spot an active nest, they skip that section and tell you, then finish it on a later visit. Many people add trimming and edging along the base on the same day. You get the same crew each time, so they learn which hedge the robins like.
Booking your main hedge trim for early spring makes this easier. Your crew can do it during a spring cleanup visit, before most birds settle in.
Want it handled? Get your price in 60 minutes, or call 1-866-904-LAWN.
Nesting Season Hedge Trimming Questions
Can I trim my hedge in June in Canada?
Yes. No federal law bans hedge trimming in June. You just can't damage or disturb a nest with a live bird or an egg in it. Watch the hedge first and skip any section with an active nest.
When does bird nesting season end in Canada?
Environment and Climate Change Canada says the general nesting period can run until late August. Some birds nest later than that. If a nest still has eggs or young in September, it's still protected.
What if I already cut into a hedge and found a nest?
Stop right away. Move away quickly and quietly. Leave that part of the hedge alone until the young have left on their own.
Is it safe to trim hedges in fall instead?
Fall is past the nesting period, but it's not great for every hedge. Cedars and other evergreens do better with an early spring trim. See our guide on when to trim cedar hedges for the reasons.
Rules change, so check with Environment and Climate Change Canada and your province before you plan. Sources: Migratory Birds Regulations, 2022 FAQ, ECCC general nesting periods, ECCC reducing risk to migratory birds, Birds protected in Canada, Migratory Birds Convention Act FAQ, Ontario: remove bird nests or eggs.
