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birds.cz

https://birds.cz· First analyzed 13 May 2026· Updated 13 May 2026
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birds.cz
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Mobile

Sponsored

Hosting Provider

Fortion Cloud

IP Address

185.175.84.134

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS44984

Organization

Fortion Cloud

Server

Apache

Nameservers

ns.fortion.cz.ns.fortion.net.

Performance

96

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
47 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Fortion Cloud

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

CSS Frameworks

2
Tailwind CSS
Material UI

Analytics

2
Google Analytics
Google Analytics 4

UI Components

1
Fancybox

Web Servers

1
Apache

SEO Analysis

C61/100
16
9
0
Meta Tags11/15
Content8/12
Headings5/8
Technical13/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
B
birds.czbirds.cz

Avif | Faunistická databáze České společnosti ornitologické

Faunistická databáze České společnosti ornitologické

Title Length59 chars

Recommended: 50-60 chars (~346px / 580px)

Description Length52 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    robots.txt

    3 rules

    Local SEO

    Local Search Readiness

    10/100
    Poor
    3 12 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    F26/100
    Bot Access
    3/25
    Machine Read.
    16/25
    Schema Data
    0/25
    Citation
    7/25

    AI Bot Access

    0/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txtinvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:2%
    Words:892
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headings
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    C
    68/100
    8
    Passed
    4
    Critical
    3
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    12/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    41/100
    C
    196 mg
    CO₂e / view
    1.5 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    224 mg
    vs
    Returning (cached)
    112 mg
    Annual (10K/mo)
    23.6 kg
    Emission Segments
    Data Center
    44 mg
    Network
    47 mg
    Device
    105 mg
    Resource Breakdown
    JavaScript
    743.8 KB
    Images
    213.4 KB
    CSS
    96.3 KB
    HTML
    1.7 KB
    Other
    531.9 KB
    Green Hosting Not Verified
    Fortion Cloud
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    18d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/1.1

    Valid From

    02.03.2026

    Valid Until

    31.05.2026

    Subject Alternative Names (20)

    api.birds.czapi.rorysi.czatlas.birds.czatlas.rorysi.czavif-2-0.birds.czavif-2-0.rorysi.czavif-localities-admin.birds.czavif-localities-admin.rorysi.cz+12 more

    SHA-256 Fingerprint

    D8:88:B0:76:1F:0D:B9:1E:32:9D:F0:B1:7E:49:3A:43:E8:00:6F:45...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    cache-control
    🔴 No Cache(no-cache, max-age=259200, must-revalidate)
    connection
    Keep-Alive
    content-encoding
    📦 Gzip(gzip)
    content-length
    1403
    content-type
    text/html
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (3)

    mx2.fortion.net
    mx1.fortion.net
    mx0.fortion.net

    Domain Information

    birds.cz

    Domain Age
    18y 5m

    Created

    12.12.2007

    Expires

    11.12.2026

    Registrar

    REG-INTERNET-CZ

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Data Protection Officer mentioned

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    B
    74/100
    Mobile Friendly7 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans

    WCAG AA
    69/100
    Readability
    /30
    17/30

    13px · LH 1.66

    Hierarchy
    /20
    13/20

    2.31x ratio

    WCAG
    /25
    19/25

    4.59:1 min contrast

    Performance
    /25
    20/25

    System fonts

    Heading Font

    Open Sans

    Sans30px

    Body Font

    Open Sans

    Sans13px

    Contrast Ratio

    4.59:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~48 CPL

    Optimal (45–75)
    30px
    h1
    18px
    h4
    13px
    p

    ❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

    ✅ Optimal line length: ~48 chars/line (ideal 45–75 CPL).

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.6:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 2.3x larger than body text.

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    Buy on MyFontsFlesch 61

    Color Palette

    7 unique colors
    4.56:1 AA Dark
    #6e777e
    Other· 53.1%
    #ffffff
    Text· 9.2%
    #1a3050
    Primary· 0%
    #323d4c
    Secondary· 14.7%
    #101c2c
    Secondary· 10.2%
    #7e7066
    Border· 5.4%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    4 Resources

    2
    Scripts
    2
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(1)local(1)

    Website Identity

    birds.cz

    admin@birds.cz
    18 years old
    Location detected: 🇨🇿 Czech Republicvia tld
    REG-INTERNET-CZcs

    Sponsored

    Last analyzed: 13 May 2026 at 00:13

    Historical Analysis & Change Tracking