I think its about the exit entry space between the ladder rungs thats smaller than the birds fully extended wing span . Although i dont if crows are quite smart enough to hang on the rung and crawl out. If it works it works !
If you read research articles on crows, and not popular gibberish in newspapers, you will find crows eat a lot of insects that eat crops, and mice are one of their favorite foods. Give the crows a break. Don't believe the old-fashioned ideas and myths that are passed down through the generations. Crows rarely eat songbirds. After 6 years of fieldwork I have only seen one robin's nest pilfered. The robins will quickly renest if time. More songbirds are killed from crashing into the windows of your home than crows ever will eat. Crows are not a threat to wild waterfowl eggs and young. More mythology.
You're not a farmer so you dont understand. Hooded/ gray crows do many things, such as pick the eyes and brains (through the nostrils) out of lambs and sheep that are vulnerable such as sheep that are stuck on their backs. They are also destructive to ground nesting birds especially game birds like pheasant and grouse. Corvids can spread disease especially on dairy farms. They poke holes in silage bales, making the silage rancid. You are the one with the mythology, then again, you're an American so you have to spout garbage without knowing anything.
Crows will run hawks off and pilfer hawk nests to do so. They don't do it for the hawks chicks either. They do it to run the hawks off the voles and field mice.
@@mikhail8450 il faut les effrayer des endroits non désirez jai des corneilles noires içi jen chope une ou deux et fait peur a c elle qui començait a visiter les nids des pigeons et depuis elles ce contente de trucs crever que je leurs met pendant la ponte des poules et chasse l'eprvier en contrepartie qui ma bouffer x pigeons autrement les béts sauvages apprenent vite a évitez les coins d'ou ont les chassse sinon pourquoi lorsque l'on prend le train ont voit des champs vide de corbeaux sur des kms ..quand ils s'entasse dans d'autres .. un seul couple de corneilles chasse les autres de sont territoire des sacs poubelle noire évaser accrocher a pendre aprés de poteaux ..et secouer par le vent peut leur fait croire a des collégue morts jen ai 'des recapées' ça bouffe un tas de petites bétes crevée toute seule.
Crows eat carrion....seems they benefit the countryside.I live in north America and raise 600 lambs yearly,and the only lambs iv ever seen crows eat the eyes were stillborn on the range....you English have a perverse fascination over managing the countryside and destroying ANYTHING wild.
Helping the farmer how? ....Oh right, they make a big mess...they are noisy...they are destroying the planet...Wait, are we talking about crows or farmers?
